Biology Unit 1 aqa- digestive system

Including major parts of the digestive system

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  • Created by: Lisa
  • Created on: 20-04-13 21:52
Name the first major part of the digestive system its fuction & how it is adapted for this?
Salivary glands near the mouth- pass secretions via a duct into the mouth (including amylase))
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Name the second major part of the digestive system its fuction & how it is adapted for this?
Oesophagus (transport- carries food from mouth to stomach)made of thick muscular wall.
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Name the third major part of the digestive system its fuction & how it is adapted for this?
Stomach- muscular sac whose lining produces enzymes (stores and digests food- mostly proteins) also has mucus producing glands (so doesn't digest itself) churns contents increasing surface area for chemical digestion
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Name the fourth major part of the digestive system its fuction & how it is adapted for this?
Pancreas- large gland below stomach secretes pancreatic juice (contains protease, lipase, amylase)
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Name the fifth major part of the digestive system its fuction & how it is adapted for this?
Small intestine long muscular tube (further digestion by enzymes from glands and lining) walls folded into villi and microvilli increases the surface area
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Name the sixth major part of the digestive system its fuction & how it is adapted for this?
Large intestine absorbs water- mostly reabsorbtion of water from secretions,food becomes drier and forms faeces
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Name the seventh major part of the digestive system its fuction & how it is adapted for this?
Rectum final section of the intestines stores faeces before it is removed via the anus (egestion)
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What is physical digestion?
Breaking down large pieces of food to smaller ones using structures eg teeth- increases large surface area for chemical digestion
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What is chemical digestion?
Breaks down large insoluble molcules into smaller soluble ones. It is carried out by enzymes through hydrolysis (hydrolases)
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Card 2

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Name the second major part of the digestive system its fuction & how it is adapted for this?

Back

Oesophagus (transport- carries food from mouth to stomach)made of thick muscular wall.

Card 3

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Name the third major part of the digestive system its fuction & how it is adapted for this?

Back

Preview of the front of card 3

Card 4

Front

Name the fourth major part of the digestive system its fuction & how it is adapted for this?

Back

Preview of the front of card 4

Card 5

Front

Name the fifth major part of the digestive system its fuction & how it is adapted for this?

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