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Summary AQA GCSE Biology Organisation (Topic 2) Revision Notes $3.88
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Summary AQA GCSE Biology Organisation (Topic 2) Revision Notes

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These are detailed Revision Notes for Topic Two (Organisation) of AQA GCSE Biology. They are written by me, using a combination of class notes, text books and revision guides. I have also uploaded the other chapters in my store.

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  • May 31, 2020
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By: lilypinnock • 4 year ago

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By: annabelhardcastle1 • 4 year ago

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By: emilysarahjudge • 4 year ago

Thank you very much for your purchase and kind review. I have just uploaded all the other GCSE Biology topics to my page and created a bundle if you are interested. Thanks again, Emily x

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Organisation – Animals
Cell Organisation:
 Cells – the basic building blocks of all living organisms
 Tissues – groups of cells with similar structure and functions
 Organs – groups of tissues that perform a specific function
 Organ systems – organs are organized into organ systems
 Organisms – the different organ systems make up organisms
The Digestive System:
 Salivary Glands
o The saliva acts as a lubricant making it easier to swallow food.
o It contains amylase, which is a carbohydrase which breaks down
starch.
 Oesophagus
o Moves food along to the stomach by peristalsis.
o The lining of the tube secrets mucus to lubricate the bolus of
food.
 Stomach
o A muscular bag that churns the food and mixes it with
hydrochloric acid and protease enzyme.
o The protease (pepsin) breaks down proteins
o The acid kills bacteria and creates good conditions for the
enzyme to work in.
 Small Intestine
o This tube produces the 3 types of enzyme itself to break down
fat, starch and protein but it also gets chemicals from the
pancreas and the gall bladder.
o This is also where the digested food is absorbed out of the
digestive system into the blood.
 Pancreas
o Produces 3 types of enzyme (carbohydrase, protease and lipase),
which break down starch, protein ad fat.
o The liquids secreted passes down the pancreatic duct into the
small intestine
o No food goes into this organ.
 Liver
o Produces bile, which emulsifies fat.
o The bile is sored in the gall bladder
o Bile neutralises stomach acid and emulsifies fats.
 Gall Bladder
o Bile is stored here
o It passes down the bile duct into the small intestine

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