The digestive system
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Last updated 12:53 PM on 12/17/22
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12 Terms
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Ingestion
Taking food into the body
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Digestion
Breakdown of complex food substances into smaller soluble food substances
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Absorption
Digested food is absorbed into the blood by diffusion and active transport
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Assimilation
Absorbed food is used to provide energy and form new materials and cells
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Egestion
Removal of undigested waste material
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Mouth
Where food is taken in. Physical and chemical digestion takes place here. Food forms into a ball known as a bolus
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Oesophagus
Food moves along the oesophagus by peristalsis. This involves the walls of the oesophagus contracting
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Stomach
Muscular walls of the stomach churns the food. Hydrochloric acid maintains a low pH for optimum activity of enzymes and kills bacteria
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Small intestine
Villi secrete digestive enzymes and provide large surface area to absorb digested food
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Large intestine
Large quantities of water are absorbed back into the body
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Rectum
Faeces is stored here
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Anus
Faeces passes out of the body here
Note 
Flashcards (44)