The Digestive System 962

Question 1

are to break down the foods you eat, release
their nutrients, and absorb those nutrients into the body as well as to generate, store, and excrete some of our wastes.

Answer 1

digestive system

Question 2

There are additional organs outside of the tract that function in digestion, but food does not pass through them.

Answer 2

gastrointestinal (GI) tract

Question 3

are vital to the functioning of the digestive system even though they are not part of the GI tract.

Answer 3

accessory digestive organs

Question 4

is a layer of mucous membrane, meaning an epithelium enriched with mucus, similar to the epithelial linings of the nose or respiratory system.

Answer 4

mucosa

Question 4

The four layers of the wall of the GI tract, starting with the innermost layer,

Answer 4

are the mucosa, the submucosa, the muscularis, and the serosa

Question 5

contains numerous blood and lymphatic ves
sels that transport nutrients absorbed across the wall of the GI tract organs to other
parts of the body.

Answer 5

lamina propria

Question 6

This thin layer of smooth muscle is in a constant state of tension, pulling the mucosa of the stomach and small intestine into undulating folds.

Answer 6

muscularis mucosa

Question 6

lies immediately beneath the mucosa. Because the mucosal epithelium is avascular, the submucosa is rich with blood and lymphatic vessels and also contains some submucosal glands that release digestive
secretions.

Answer 6

submucosa

Question 7

in most organs is made up of a double layer of smooth muscle: an inner circular layer and an outer longitudinal layer.

Answer 7

muscularis

Question 8

The cheeks, tongue, and palate frame the mouth, which is also called the

Answer 8

oral cavity (or buccal cavity)

Question 8

is a fold of mucous membrane that attaches the inner surface of each lip to the gum found at the midline of the mouth.

Answer 8

labial frenulum

Question 9

At the entrance to the mouth are the lips

Answer 9

or labia

Question 10

These muscles, along with the tongue, enable the movements of chewing, otherwise known as

Answer 10

mastication

Question 10

The inferior border is the tongue, and the posterior border contains the opening between the posterior of the oral cavity and throat (oropharynx), called the

Answer 10

fauces

Question 11

. It is created by the maxillary and palatine bones of the skull and, given its bony structure, is known as the

Answer 11

hard palate