Unit 7: Animal Form and Function
food to meet their energy needs.
Animals can synthesize about half of the
amino acids required for protein synthesis, the rest are
amino acids that must be obtained from
body plans have a
cavity that functions in both digestion and distribution of nutrients.
More complex animals possess a digestive
canal) organized into specialized
for digestion and absorption.
consists of the
canal and various accessory
that secrete digestive juices.
Food is conducted
down to the stomach by
The stomach secretes
juice made up of
acid (HCl) and the enzyme
, starting the protein digestion process and converting food to
The longest section of the alimentary canal is the
which is the major organ of
, moving the food toward the anus by
The first portion of the small intestine is the
mixes with digestive juices from the
, and concentrates wastes into solid
, which pass through the
and exit via the
Herbivores need a long time to digest the
in vegetation. and have
Many herbivorous animals, including
such as cattle, have
microorganisms digest the cellulose.
Digestive System Function
Jul 1, 2009