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WJEC GCSE Biology Unit 1 Revision Map PDF & Knowledge Organisers

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A <3

06/08/2025

Biology

WJEC GCSE Biology Unit 1

1,321

6 Aug 2025

8 pages

WJEC GCSE Biology Unit 1 Revision Map PDF & Knowledge Organisers

user profile picture

A <3

@awright_ouju

Biology is a fascinating study of living organisms and their... Show more

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Understanding Specialized Cells and Their Functions in Biology

Specialised cells are fundamental structures in living organisms that have adapted to perform specific functions efficiently. In both plants and animals, these cells undergo a process called differentiation to develop unique characteristics suited to their roles.

Specialized cells in gcse biology examples include ciliated cells in the respiratory tract, red blood cells for oxygen transport, and root hair cells in plants. Each type demonstrates remarkable adaptations - ciliated cells have tiny hair-like projections for moving mucus, while red blood cells lack nuclei to maximize hemoglobin capacity. Plant cells show equally fascinating specializations, with specialised cells in plants featuring distinct structures like cell walls and chloroplasts.

The organization of these cells follows a hierarchical pattern: similar cells form tissues, tissues combine into organs, and organs work together in organ systems. This structural arrangement enables complex organisms to function effectively through specialized components working in harmony.

Definition: Differentiation is the process by which cells become specialized for particular functions, developing specific features and capabilities.

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

The Respiratory System: Structure and Function

The respiratory system gcse AQA curriculum covers this vital body system that enables gas exchange and cellular respiration. The system's complexity reflects its crucial role in maintaining life through oxygen delivery and carbon dioxide removal.

The mechanism of breathing involves coordinated actions of the diaphragm and intercostal muscles. During inspiration, the diaphragm contracts and moves downward while intercostal muscles lift the ribs, increasing thoracic volume and decreasing pressure to draw air into the lungs.

Highlight: The alveoli are specialized structures where gas exchange occurs, featuring thin walls and rich blood supply for efficient diffusion of oxygen and carbon dioxide.

Smoking's harmful effects on the respiratory system bbc bitesize include paralysis of cilia, leading to mucus buildup and increased risk of bronchitis and lung cancer. The presence of tar and nicotine causes long-term damage to lung tissue, potentially resulting in emphysema.

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Transport and Exchange in Biological Systems

Understanding transport mechanisms is crucial for WJEC GCSE Biology specification studies. Diffusion, osmosis, and active transport represent the primary methods by which substances move within and between cells.

Diffusion occurs when substances move from areas of high concentration to low concentration, requiring no energy input. This process is vital for gas exchange in lungs and nutrient absorption in the digestive system. Osmosis, specifically involving water movement, follows similar principles but through semi-permeable membranes.

Example: In practical investigations using Visking tubing, students can observe diffusion by monitoring glucose movement through a semi-permeable membrane, demonstrating key principles of cellular transport.

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Digestive System and Nutrition

The digestive system demonstrates how specialized organs work together to process food through mechanical and chemical digestion. This topic is central to WJEC Unit 1 Biology A level understanding.

Enzymes play crucial roles throughout the digestive tract, with specific enzymes working at optimal conditions. Amylase breaks down carbohydrates in the mouth, while proteases in the stomach work best in acidic conditions to digest proteins.

The small intestine's structure perfectly illustrates biological adaptation, with villi increasing surface area for efficient absorption. Nutrients enter the bloodstream through these specialized structures, demonstrating how form matches function in biological systems.

Vocabulary: Peristalsis - coordinated muscle contractions that move food through the digestive tract, essential for proper digestion and absorption.

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Cells and Specialized Cells

This page covers the fundamental structures and functions of plant and animal cells, as well as specialized cells.

Plant and Animal Cell Structure

Plant and animal cells have several key components:

  • Cell membrane: Controls what enters and leaves the cell
  • Nucleus: Contains DNA and controls cell function
  • Cytoplasm: Where chemical reactions occur
  • Mitochondria: Site of aerobic respiration

Plant cells additionally have:

  • Cell wall: Made of cellulose for support
  • Chloroplasts: Contain chlorophyll for photosynthesis
  • Large vacuole: Filled with cell sap for support

Definition: Specialized cells are adapted to carry out specific functions more efficiently. The process of a cell becoming specialized is called differentiation.

Examples of specialized cells include:

  • Ciliated cells
  • Red blood cells
  • Root hair cells

Highlight: Understanding cell structure and specialized cells is crucial for WJEC GCSE Biology Unit 1 and forms the foundation for more complex biological concepts.

Cell Organization and Processes

The page also covers important cellular processes:

  • Diffusion: Movement of substances from high to low concentration
  • Osmosis: Movement of water through a semipermeable membrane
  • Active transport: Movement of substances against the concentration gradient using energy

Vocabulary: Turgid refers to a plant cell that is swollen and rigid due to high water content, while flaccid describes a plant cell that has lost water and become limp.

The document also mentions light and electron microscopes, highlighting their differences in magnification and resolution.

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras
3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras
3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras


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This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

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Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

 

Biology

1,321

6 Aug 2025

8 pages

WJEC GCSE Biology Unit 1 Revision Map PDF & Knowledge Organisers

user profile picture

A <3

@awright_ouju

Biology is a fascinating study of living organisms and their essential processes, from the microscopic to whole body systems.

Specialised cellsare fundamental building blocks that have adapted for specific functions in organisms. In humans, examples include sperm cells with... Show more

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

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Understanding Specialized Cells and Their Functions in Biology

Specialised cells are fundamental structures in living organisms that have adapted to perform specific functions efficiently. In both plants and animals, these cells undergo a process called differentiation to develop unique characteristics suited to their roles.

Specialized cells in gcse biology examples include ciliated cells in the respiratory tract, red blood cells for oxygen transport, and root hair cells in plants. Each type demonstrates remarkable adaptations - ciliated cells have tiny hair-like projections for moving mucus, while red blood cells lack nuclei to maximize hemoglobin capacity. Plant cells show equally fascinating specializations, with specialised cells in plants featuring distinct structures like cell walls and chloroplasts.

The organization of these cells follows a hierarchical pattern: similar cells form tissues, tissues combine into organs, and organs work together in organ systems. This structural arrangement enables complex organisms to function effectively through specialized components working in harmony.

Definition: Differentiation is the process by which cells become specialized for particular functions, developing specific features and capabilities.

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

The Respiratory System: Structure and Function

The respiratory system gcse AQA curriculum covers this vital body system that enables gas exchange and cellular respiration. The system's complexity reflects its crucial role in maintaining life through oxygen delivery and carbon dioxide removal.

The mechanism of breathing involves coordinated actions of the diaphragm and intercostal muscles. During inspiration, the diaphragm contracts and moves downward while intercostal muscles lift the ribs, increasing thoracic volume and decreasing pressure to draw air into the lungs.

Highlight: The alveoli are specialized structures where gas exchange occurs, featuring thin walls and rich blood supply for efficient diffusion of oxygen and carbon dioxide.

Smoking's harmful effects on the respiratory system bbc bitesize include paralysis of cilia, leading to mucus buildup and increased risk of bronchitis and lung cancer. The presence of tar and nicotine causes long-term damage to lung tissue, potentially resulting in emphysema.

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Transport and Exchange in Biological Systems

Understanding transport mechanisms is crucial for WJEC GCSE Biology specification studies. Diffusion, osmosis, and active transport represent the primary methods by which substances move within and between cells.

Diffusion occurs when substances move from areas of high concentration to low concentration, requiring no energy input. This process is vital for gas exchange in lungs and nutrient absorption in the digestive system. Osmosis, specifically involving water movement, follows similar principles but through semi-permeable membranes.

Example: In practical investigations using Visking tubing, students can observe diffusion by monitoring glucose movement through a semi-permeable membrane, demonstrating key principles of cellular transport.

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Digestive System and Nutrition

The digestive system demonstrates how specialized organs work together to process food through mechanical and chemical digestion. This topic is central to WJEC Unit 1 Biology A level understanding.

Enzymes play crucial roles throughout the digestive tract, with specific enzymes working at optimal conditions. Amylase breaks down carbohydrates in the mouth, while proteases in the stomach work best in acidic conditions to digest proteins.

The small intestine's structure perfectly illustrates biological adaptation, with villi increasing surface area for efficient absorption. Nutrients enter the bloodstream through these specialized structures, demonstrating how form matches function in biological systems.

Vocabulary: Peristalsis - coordinated muscle contractions that move food through the digestive tract, essential for proper digestion and absorption.

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Cells and Specialized Cells

This page covers the fundamental structures and functions of plant and animal cells, as well as specialized cells.

Plant and Animal Cell Structure

Plant and animal cells have several key components:

  • Cell membrane: Controls what enters and leaves the cell
  • Nucleus: Contains DNA and controls cell function
  • Cytoplasm: Where chemical reactions occur
  • Mitochondria: Site of aerobic respiration

Plant cells additionally have:

  • Cell wall: Made of cellulose for support
  • Chloroplasts: Contain chlorophyll for photosynthesis
  • Large vacuole: Filled with cell sap for support

Definition: Specialized cells are adapted to carry out specific functions more efficiently. The process of a cell becoming specialized is called differentiation.

Examples of specialized cells include:

  • Ciliated cells
  • Red blood cells
  • Root hair cells

Highlight: Understanding cell structure and specialized cells is crucial for WJEC GCSE Biology Unit 1 and forms the foundation for more complex biological concepts.

Cell Organization and Processes

The page also covers important cellular processes:

  • Diffusion: Movement of substances from high to low concentration
  • Osmosis: Movement of water through a semipermeable membrane
  • Active transport: Movement of substances against the concentration gradient using energy

Vocabulary: Turgid refers to a plant cell that is swollen and rigid due to high water content, while flaccid describes a plant cell that has lost water and become limp.

The document also mentions light and electron microscopes, highlighting their differences in magnification and resolution.

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras
3รวจ ก
Biology Unit
APPAR CELLS
Cell wall-cellulose-support cell
Cell membrane-controls what enters and leaves
nudeus-contains DNA -Contras

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.

Where can I download the Knowunity app?

You can download the app from Google Play Store and Apple App Store.

Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.9/5

App Store

4.8/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user