Digestive Tract

The major regional characteristics and cell types of the digestive tract are summarized in Table 1-7-1.

Table 1-7-1. Digestive Tract—Regional Comparisons

, Region

Major Characteristics

Mucosal Cell Types at Surface

Function of Surface Mucosal Cells


Nonkeratinized Stratified squamous epithelium; skeletal muscle in muscularis externa (upper 1/3); smooth muscle (lower 1/3)

Stomach: body and fundus

Rugae: shallow pits; deep glands

Mucous cells

Secrete mucus. Form protective layer against acid. Tight junctions between these cells probably contributes to the acid barrier of the epithelium.

Enteroendocrine (EE) cells

Secrete pepsinogen and lipase precursor.

Secrete HCI and intrinsic factor.

Secrete a variety of peptide hormones.

! Stomach: pylorus

Deep pits; shallow branched glands

Mucous cells

Parietal cells EE cells

Same as above.

Same as above.

High concentration of gastrin.




Was this article helpful?

0 0
The Prevention and Treatment of Headaches

The Prevention and Treatment of Headaches

Are Constant Headaches Making Your Life Stressful? Discover Proven Methods For Eliminating Even The Most Powerful Of Headaches, It’s Easier Than You Think… Stop Chronic Migraine Pain and Tension Headaches From Destroying Your Life… Proven steps anyone can take to overcome even the worst chronic head pain…

Get My Free Audio Book

Post a comment