Digestive System
Vocabulary List 9
103. The digestive system is a group of organs that work
together to break down food so it can be used by your
body.
104. Peristalsis are wavelike motions that squeeze food
through the digestive tract.
105. Enzymes are chemicals that speed up a reaction.
106. Nutrients are substances that provide energy or the
necessary materials to build cells and run cell
activities. There are six main nutrients. You should
be able to list them:
A. Carbohydrates
B. Fats
C. Proteins
D. Minerals
E. Vitamins
F. Water
107. Mechanical digestion is the breaking, crushing, and
mashing of food.
108. Chemical digestion is where large molecules are
broken into smaller molecules by chemicals in your
body.
109. Villi are finger-like projections in the small intestines
that increase the surface area through which
absorption of nutrients takes place.