The Digestive System Content Practice B LESSON 2

Name
Date
Class
Content Practice B
LESSON 2
The Digestive System
Directions: On each line, write the term that correctly completes each sentence.
1. Ingestion is the act of
.
2. Digestion is the breakdown of food into small particles and molecules that your body
can
and use.
3. Absorption occurs when the cells in the digestive system take in small molecules of
digested
.
4. Food is physically broken into smaller pieces during
digestion.
5. In
digestion,
down pieces of food into small molecules.
6. Enzymes are
reactions break
that help break down larger molecules and
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
speed up the rate of chemical reactions.
7. The digestion of food begins in the
.
8. The esophagus is a muscular tube that connects the
the
to
.
9. Food is moved through the digestive tract by waves of muscle contractions,
called
.
10. When food leaves the
, it is in the form of a thin, watery
liquid called chyme.
11. Villi are small fingerlike projections in the
through which
nutrients enter the blood.
12. The
system carries nutrients to other body systems that
need them to help maintain homeostasis.
Digestion and Excretion
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