blood through the walls of digest and absorb sugars, iodine test for starch (add food and Two bowls the gut. The blood carries foods. and Biuret reagent for protein. mash). Squirt in Masher the small molecules to the saliva Food Identify the positions Biology AT 2. cells of the body where they transfer into a Bottle of ‘saliva’ of the main organs on Recap the functions of the can be used for respiration sandwich bag and ‘enzymes’ a diagram of the digestive system, and organs or to make the new large (stomach) and Sieve digestive system. in the system from KS3. molecules that the cells squeeze with Two sandwich Know that food need as reserves of energy bags ‘enzymes’ Label a diagram of the molecules must be or for growth and repair. transfer into Scissors digestive system and colour small and soluble in another bowl via a Microscopes areas where digestion, Starch is a carbohydrate. Its order to be absorbed sieve (small Slides of small digestion and absorption of molecules consist of a long into the blood. intestine) intestine. food and absorption of water chain of glucose molecules. what is left in the Describe how amino occur. Digestion by carbohydrase must be acids are broken enzymes breaks down Watch the video of digestion Teachit Science soaked up with a down in the liver to insoluble starch to of an egg sandwich (see resource sponge (large form urea for glucose. Cells use resources). intestine) then excretion by the glucose during respiration. emptied into a Describe the pathway of an kidneys as urine. Lipids are fats and oils. small sandwich egg sandwich from mouth to Digestion by lipase bag (rectum) anus. Tell it as a story. enzymes breaks down lipids cut a hole in corner Links to 4.7.4.7 Enzymes to glycerol and fatty acids. of bag for anus Cells reform fats from the and show egestion Students design a game fatty acids and glycerol to aid learning. They should View sections of the molecules. Fats are stored include: nutrient, structure small intestine under a as a source of energy and function, digestive microscope because cells can break enzyme, product.
blood through the walls of the gut. The blood carries the small molecules to the cells of the body where they can be used for respiration or to make the new large molecules that the cells need as reserves of energy or for growth and repair. Starch is a carbohydrate. Its molecules consist of a long chain of glucose molecules. Digestion by carbohydrase enzymes breaks down insoluble starch to glucose. Cells use glucose during respiration. Lipids are fats and oils. Digestion by lipase enzymes breaks down lipids to glycerol and fatty acids. Cells reform fats from the fatty acids and glycerol molecules. Fats are stored as a source of energy because cells can break digest and absorb foods. Identify the positions of the main organs on a diagram of the digestive system. Know that food molecules must be small and soluble in order to be absorbed into the blood. Describe how amino acids are broken down in the liver to form urea for excretion by the kidneys as urine. sugars, iodine test for starch and Biuret reagent for protein. Biology AT 2. Recap the functions of the digestive system, and organs in the system from KS3. Label a diagram of the digestive system and colour areas where digestion, digestion and absorption of food and absorption of water occur. Watch the video of digestion of an egg sandwich (see resources). Describe the pathway of an egg sandwich from mouth to anus. Tell it as a story. Links to 4.7.4.7 Enzymes Students design a game to aid learning. They should include: nutrient, structure and function, digestive enzyme, product. (add food and mash). Squirt in saliva transfer into a sandwich bag (stomach) and squeeze with ‘enzymes’ transfer into another bowl via a sieve (small intestine) what is left in the must be soaked up with a sponge (large intestine) then emptied into a small sandwich bag (rectum) cut a hole in corner of bag for anus and show egestion View sections of the small intestine under a microscope Two bowls Masher Food Bottle of ‘saliva’ and ‘enzymes’ Sieve Two sandwich bags Scissors Microscopes Slides of small intestine. Teachit Science resource
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