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Digestion
study guide
7
Science
7th Grade
01/19/2009

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Term
digestion
Definition
the process that breaks down food into small molecules so that they can be moved into the blood and absorbed by the cells
Term
mechanical digestion
Definition
digestion that takes place when food is chewed, mixed, and churned
Term
chemical digestion
Definition
digestion that takes place when chemical reactions break down large molecules of food into smaller ones
Term
villi
Definition
finger like projections in the small intestine
Term
peristalsis
Definition
waves of muscle contractions
Term
chyme
Definition
food from the stomach that has been changed into a thin, watery liquid that moves into the small intestine
Term
enzyme
Definition
a type of protein that speeds up the rate of a chemical reaction in the body
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