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10 Cards in this Set
- Front
- Back
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Stages of Digestion
• The five stages of digestion are ingestion, digestion, absorption, assimilation and egestion. |
• Ingestion is the taking of food into the mouth • Digestion is the breaking down of food
• Absorption is the absorption of molecules of food into the blood in thesmall intestine • Assimilation is the taking of food molecules from the blood into bodycells. • Egestion is the passing of undigested food out of the body. • Physical digestion involves the chewing of food in the mouth andchurning of food in the stomach. • The four types of teeth are incisors, canines, premolars and molars. • Chemical digestion is the breaking down of food by enzymes. |
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The Digestive System:
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• The digestive system is a group of organs working together to breakdown food and absorb the nutrients from it.
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mouth |
• The mouth chews food and mixes it with enzymes, eg. amylase in saliva.
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peristalsis |
• The oesophagus carries food to the stomach by muscular action(peristalsis).
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stomach |
• The stomach stores and churns food and mixes it with digestive juices. Italso produces hydrochloric acid to kill bacteria.
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liver |
• The liver produces bile to break down fats.
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small intestine |
• The small intestine contains enzymes to break down food. Foodmolecules are absorbed into the blood in the small intestine.
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pancreas |
• The pancreas produces enzymes
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large intestine |
• The large intestine passes water into the blood.
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substrate and product |
• ///// Amylase is an enzyme which breaks down starch (substrate) intomaltose (product) \\\\\
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