21: Digestive System I

Front 1

What are the 5 functions needed to accomplish digestion?

Back 1

1. Mechanical and chemical breakdown
2. Movement of contents down tube
3. Transport of products of digestion to blood
4. Protection of cells lining the digestive tube
5. Regulation of digestion

Front 2

What are the general layers of the digestive tube?

Back 2

1. Mucosa (w/ muscularis mucosae)
2. Submucosa (w/ Meissner's Plexus)
3. Muscularis externa (inner circular contracts, outer longitudinal shortens, Aurebach's)
4. Serosa (Mesothelial cells)

Front 3

How does the epithelium in the mouth/esophagus compare to the intestines?

Back 3

Mouth/esophagus = stratified

Intestines = simple

Front 4

How does the epithelium provide physical protection the esophagus?

Back 4

Stratified squamous imparts strength

Front 5

How does the epithelium provide chemical protection for the digestive tube?

Back 5

Mucus
Glycocalyx

Front 6

What types of cells are responsible for mucus secretions of the digestive tube epithelia? (3)

Back 6

1. Goblet cells (single cell glands)
2. Mucosal glands (Crypts of Lieberkuhn in intestines)
3. Submucosal glands (esophagus and duodenum)

Front 7

What does the lamina propria of the digestive tube contain? (3)

Back 7

1. Connective tissue for support
2. Vascular system
3. Macrophages, lymphcytes, plasma, mast, eosinophils, fibroblasts, smooth muscle