Digestive

Question 1

Provides the body with the nutrients, water and electrolytes essential for health.

Consists of a hollow tube extending from the mouth to the anus, into which various accessory organs or glands empty their secretions.

Answer 1

Digestive system

Question 2

Is technically outside the body because it has contact only with the cells lining the tract.

Is approximately 9 meters long in a cadaver but is considerably shorter in a living person due to muscle tone.

Answer 2

Alimentary canal or Gastro Intestinal Tract

Question 3

For ingested food to become available to the body cells, it must first be broken down physically (by chewing) and chemically (by enzymatic hydrolysis) into its smaller diffusible molecules – a process called

Answer 3

Digestion

Question 4

The digested end products can then pass through the epithelial cells lining the tract into the blood for distribution to the body cells

Answer 4

Absorption

Question 5

Essentially, the alimentary canal wall has four basic Tunics (layers).

Answer 5

Mucosa (Mucous membrane)
Submucosa
Muscularis Externa
Serosa

Question 6

Is the wet epithelial membrane surrounding the alimentary canal lumen. The major functions of the [. ] are secretion, absorption of digested foodstuffs and protection against bacterial invasion.

Answer 6

Mucosa (Mucous membrane)

Question 7

Is moderately dense connective tissue containing blood and lymphatic vessels, scattered lymphoid follicles and nerve fibers. Its vessels absorb and transport nutrients, and its abundant elastic fibers help maintain the normal shape of each organ.

Answer 7

Submucosa

Question 8

Is a bilayer of smooth muscle, with the inner layer running circularly and the outer layer running longitudinally. This layer moves the contents of the canal along by segmentation and peristalsis. An important intrinsic nerve plexus, the myenteric plexus, associated with this tunic is the major regulator of GI motility.

Answer 8

Muscularis Externa ( Muscularis)

Question 9

Is the outermost covering of the intraperitoneal organs which is also called the visceral peritoneum. It consist of mesothelium associated with a thin layer of areolar connective tissue. The [. ] reduces friction as the mobile digestive system organs work and slide across one another and the cavity walls.

Answer 9

Serosa