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16 Mar 2023
โข
Year 8 Biology - Cool Food Digestion and Enzyme Fun! ๐
E
Eliza Haigh
@elizahaigh_ngxf
The Digestive System and Healthy Lifestyle
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:
- Mouth: Food is chewed and mixed with saliva
- Stomach: Churns and mixes food with hydrochloric acid
- Liver: Produces bile to help break down fat droplets
- Pancreas: Produces digestive juices containing enzymes
- Small intestine: Completes digestion and absorbs nutrients into the bloodstream
- Large intestine: Absorbs water into the bloodstream
- Rectum: Stores feces until it leaves through the anus
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 or recreational .
The page distinguishes between legal drugs and illegal drugs .
Organ Adaptations and Enzymes
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:
- Protease: Breaks down proteins
- Carbohydrase: Breaks down carbohydrates
- Lipase: Breaks down lipids
Example: Amylase enzyme is produced in the salivary glands, the small intestine and which other organ? The pancreas also produces amylase.
Specific Organs of the Digestive System
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.
Food Tests and 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:
- Food test for starch: Uses iodine, which turns black-blue if starch is present.
- Food test for lipids: Uses ethanol, which forms a cloudy emulsion with lipids.
- Food test for protein: Uses the Biuret test, which turns violet in the presence of proteins.
- Food test for glucose: Uses Benedict's solution, which turns from blue to brick-red if glucose is present.
Vocabulary: Lipids are made of smaller molecules called glycerol and three fatty acids.
The page also explains the importance of various nutrients:
- Carbohydrates and lipids provide energy
- Proteins are used for growth and repair
- Fiber provides bulk to keep food moving through the gut
- Water is needed in all cells and body fluids
Highlight: Carbohydrates, like starch, are made of small molecules called sugars, such as glucose.
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AQA Biology Topic 2-Organisation Flash cards
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4.9/5
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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 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
Year 8 Biology - Cool Food Digestion and Enzyme Fun! ๐
E
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.
- Digestive... Show more
The Digestive System and Healthy Lifestyle
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:
- Mouth: Food is chewed and mixed with saliva
- Stomach: Churns and mixes food with hydrochloric acid
- Liver: Produces bile to help break down fat droplets
- Pancreas: Produces digestive juices containing enzymes
- Small intestine: Completes digestion and absorbs nutrients into the bloodstream
- Large intestine: Absorbs water into the bloodstream
- Rectum: Stores feces until it leaves through the anus
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 or recreational .
The page distinguishes between legal drugs and illegal drugs .
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
Organ Adaptations and Enzymes
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:
- Protease: Breaks down proteins
- Carbohydrase: Breaks down carbohydrates
- Lipase: Breaks down lipids
Example: Amylase enzyme is produced in the salivary glands, the small intestine and which other organ? The pancreas also produces amylase.
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
Specific Organs of the Digestive System
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.
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
Food Tests and 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:
- Food test for starch: Uses iodine, which turns black-blue if starch is present.
- Food test for lipids: Uses ethanol, which forms a cloudy emulsion with lipids.
- Food test for protein: Uses the Biuret test, which turns violet in the presence of proteins.
- Food test for glucose: Uses Benedict's solution, which turns from blue to brick-red if glucose is present.
Vocabulary: Lipids are made of smaller molecules called glycerol and three fatty acids.
The page also explains the importance of various nutrients:
- Carbohydrates and lipids provide energy
- Proteins are used for growth and repair
- Fiber provides bulk to keep food moving through the gut
- Water is needed in all cells and body fluids
Highlight: Carbohydrates, like starch, are made of small molecules called sugars, such as glucose.
Similar content
AQA Biology Topic 2-Organisation Flash cards
674
9
Can't find what you're looking for? Explore other subjects.
Students love us โ 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 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