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Organisms respond to changes in their internal and external environments (a-level only)
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Britain & the wider world: 1745 -1901
1l the quest for political stability: germany, 1871-1991
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2d religious conflict and the church in england, c1529-c1570
2o democracy and nazism: germany, 1918-1945
1f industrialisation and the people: britain, c1783-1885
1c the tudors: england, 1485-1603
2m wars and welfare: britain in transition, 1906-1957
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2s the making of modern britain, 1951-2007
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Biology
6 Dec 2025
359
4 pages
Eliza Haigh @elizahaigh_ngxf
The digestive system is a complex network of organs that break down food into nutrients the body can... Show more
This page focuses on the structure and function of the digestive system, as well as touching on aspects of a healthy lifestyle.
The Digestive system BBC Bitesize KS3 content is reflected in the description of the digestive system's components
Example The liver produces bile, which helps break down food fat droplets into smaller, more manageable pieces.
The page also introduces the concept of malnutrition, which occurs when people don't eat the right amounts of nutrients. This can lead to deficiencies or obesity.
Definition A drug is a substance that has an effect on the body. Drugs can be medicinal (to help people suffering from pain or disease) or recreational (taken for their effects).
The page distinguishes between legal drugs (like alcohol and nicotine) and illegal drugs (such as cocaine and heroin).
This page delves deeper into how specific organs are adapted for their functions in the digestive system and introduces the crucial role of enzymes.
Highlight Enzymes speed up the breakdown of food without being used up themselves. They are biological catalysts.
The stomach is adapted with muscle tissue in its wall that contracts to churn food, breaking it down mechanically. Hydrochloric acid in the stomach kills microorganisms.
The large intestine is responsible for removing excess water from the waste left over from the digestive process.
Vocabulary Mechanical digestion refers to the physical breakdown of food, such as chewing in the mouth.
The page introduces three main types of digestive enzymes
Example Amylase enzyme is produced in the salivary glands, the small intestine and which other organ? The pancreas also produces amylase.
The final page provides detailed information about specific organs in the digestive system, expanding on their structures and functions.
The small intestine is described as a 6-meter long muscular tube where food from the stomach is mixed with enzymes for further digestion.
Definition The rectum is a 10cm long chamber where food leaves the body. When its contents are ready to be released, the muscles around the anus relax and the muscles in the rectum contract.
The esophagus is explained as a muscular tube that moves food from the mouth to the stomach through muscular contractions.
The pancreas is highlighted for its role in producing enzymes that break down proteins, fats, and carbohydrates.
Highlight The liver produces bile, which is stored in the gallbladder. Bile neutralizes stomach acid, providing alkaline conditions needed for enzymes to work effectively in the small intestine.
This page reinforces the interconnected nature of the digestive system, showing how each organ plays a specific role in the process of breaking down food and absorbing nutrients.
The first page of the Year 8 biology food digestion notes pdf introduces various food tests and explains the importance of different nutrients.
Definition Food tests are chemical procedures used to identify the presence of specific nutrients in food samples.
The page outlines several important food tests
Vocabulary Lipids are made of smaller molecules called glycerol and three fatty acids.
The page also explains the importance of various nutrients
Highlight Carbohydrates, like starch, are made of small molecules called sugars, such as glucose.
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help โ all at your fingertips.
22
Smart Tools NEW
Transform this note into: โ 50+ Practice Questions โ Interactive Flashcards โ Full Mock Exam โ Essay Outlines
Explore the intricate workings of biological systems, including the circulatory and digestive systems. This summary covers key concepts such as heart structure, blood components, enzyme functions, and the role of digestive enzymes in nutrient absorption. Ideal for students seeking a comprehensive understanding of biology organization.
BiologyExplore the essential roles of enzymes in digestion and cell organization. This summary covers key concepts such as enzyme function, the digestive process, and the impact of temperature and pH on enzyme activity. Ideal for students studying biology, this resource includes a mind map and a detailed table for easy reference.
BiologyExplore the role of digestive enzymes in breaking down food into absorbable molecules. This summary covers key enzymes like amylase, protease, and lipase, their sites of production (salivary glands, pancreas, small intestine), and the reactions they catalyze. Ideal for students studying biology and human digestion.
BiologyExplore key concepts of the digestive system and enzyme functions with this comprehensive recap. Learn about bile's role, enzyme specificity, and biological tests for sugars, starch, and proteins. Ideal for quick revision and exam preparation.
BiologyExplore the intricate roles of enzymes and the digestive system in human physiology. This summary covers key concepts such as protein structure, enzyme function, metabolic reactions, and the digestion of carbohydrates, proteins, and lipids. Understand how enzymes act as biological catalysts and the importance of pH and temperature in enzyme activity. Ideal for AQA B3 curriculum.
BiologyExplore the intricate process of human digestion, from the mouth to the large intestine. This summary covers key concepts such as digestive enzymes, nutrient absorption, and the roles of various organs in the digestive system. Ideal for GCSE biology students seeking a clear understanding of how food is processed in the body.
BiologyQuotes from every main character
English LiteratureApp Store
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 itโs 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 didnโt even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as Iโm 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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 itโs 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 didnโt even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as Iโm 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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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
Eliza Haigh
@elizahaigh_ngxf
The digestive system is a complex network of organs that break down food into nutrients the body can use. This process involves mechanical and chemical digestion, with enzymes playing a crucial role in breaking down different types of nutrients.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page focuses on the structure and function of the digestive system, as well as touching on aspects of a healthy lifestyle.
The Digestive system BBC Bitesize KS3 content is reflected in the description of the digestive system's components:
Example: The liver produces bile, which helps break down food fat droplets into smaller, more manageable pieces.
The page also introduces the concept of malnutrition, which occurs when people don't eat the right amounts of nutrients. This can lead to deficiencies or obesity.
Definition: A drug is a substance that has an effect on the body. Drugs can be medicinal (to help people suffering from pain or disease) or recreational (taken for their effects).
The page distinguishes between legal drugs (like alcohol and nicotine) and illegal drugs (such as cocaine and heroin).
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page delves deeper into how specific organs are adapted for their functions in the digestive system and introduces the crucial role of enzymes.
Highlight: Enzymes speed up the breakdown of food without being used up themselves. They are biological catalysts.
The stomach is adapted with muscle tissue in its wall that contracts to churn food, breaking it down mechanically. Hydrochloric acid in the stomach kills microorganisms.
The large intestine is responsible for removing excess water from the waste left over from the digestive process.
Vocabulary: Mechanical digestion refers to the physical breakdown of food, such as chewing in the mouth.
The page introduces three main types of digestive enzymes:
Example: Amylase enzyme is produced in the salivary glands, the small intestine and which other organ? The pancreas also produces amylase.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The final page provides detailed information about specific organs in the digestive system, expanding on their structures and functions.
The small intestine is described as a 6-meter long muscular tube where food from the stomach is mixed with enzymes for further digestion.
Definition: The rectum is a 10cm long chamber where food leaves the body. When its contents are ready to be released, the muscles around the anus relax and the muscles in the rectum contract.
The esophagus is explained as a muscular tube that moves food from the mouth to the stomach through muscular contractions.
The pancreas is highlighted for its role in producing enzymes that break down proteins, fats, and carbohydrates.
Highlight: The liver produces bile, which is stored in the gallbladder. Bile neutralizes stomach acid, providing alkaline conditions needed for enzymes to work effectively in the small intestine.
This page reinforces the interconnected nature of the digestive system, showing how each organ plays a specific role in the process of breaking down food and absorbing nutrients.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The first page of the Year 8 biology food digestion notes pdf introduces various food tests and explains the importance of different nutrients.
Definition: Food tests are chemical procedures used to identify the presence of specific nutrients in food samples.
The page outlines several important food tests:
Vocabulary: Lipids are made of smaller molecules called glycerol and three fatty acids.
The page also explains the importance of various nutrients:
Highlight: Carbohydrates, like starch, are made of small molecules called sugars, such as glucose.
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help โ all at your fingertips.
22
Smart Tools NEW
Transform this note into: โ 50+ Practice Questions โ Interactive Flashcards โ Full Mock Exam โ Essay Outlines
Explore the intricate workings of biological systems, including the circulatory and digestive systems. This summary covers key concepts such as heart structure, blood components, enzyme functions, and the role of digestive enzymes in nutrient absorption. Ideal for students seeking a comprehensive understanding of biology organization.
BiologyExplore the essential roles of enzymes in digestion and cell organization. This summary covers key concepts such as enzyme function, the digestive process, and the impact of temperature and pH on enzyme activity. Ideal for students studying biology, this resource includes a mind map and a detailed table for easy reference.
BiologyExplore the role of digestive enzymes in breaking down food into absorbable molecules. This summary covers key enzymes like amylase, protease, and lipase, their sites of production (salivary glands, pancreas, small intestine), and the reactions they catalyze. Ideal for students studying biology and human digestion.
BiologyExplore key concepts of the digestive system and enzyme functions with this comprehensive recap. Learn about bile's role, enzyme specificity, and biological tests for sugars, starch, and proteins. Ideal for quick revision and exam preparation.
BiologyExplore the intricate roles of enzymes and the digestive system in human physiology. This summary covers key concepts such as protein structure, enzyme function, metabolic reactions, and the digestion of carbohydrates, proteins, and lipids. Understand how enzymes act as biological catalysts and the importance of pH and temperature in enzyme activity. Ideal for AQA B3 curriculum.
BiologyExplore the intricate process of human digestion, from the mouth to the large intestine. This summary covers key concepts such as digestive enzymes, nutrient absorption, and the roles of various organs in the digestive system. Ideal for GCSE biology students seeking a clear understanding of how food is processed in the body.
BiologyQuotes from every main character
English LiteratureApp Store
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 itโs 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 didnโt even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as Iโm 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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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 itโs 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 didnโt even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as Iโm 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 ๐๐๐ฒ๐ค๐โจ๐๐ฎ
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
Sociology