a. secrete saliva; moisten, soften, and lubricate ingested foods, cleanse the teeth and mouth.
b. receives, stores, and digests food in the initial stage
c. completely digests food and mostly absorbs nutrients.
d. conducts either air and/or food.
e. serves in swallowing, manipulating food for chewing, and in tasting.
f. conducts food to the stomach; it has no digestive function.
g. has no digestive function, absorbs water.
h. produces an exocrine secretion (bile); synthesizes, stores, and metabolizes substances; forms embryonic blood cells; destroys aged red cells; and detoxifies.