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The Digestive System Laboratory

The Digestive System Laboratory. Overview. Function of the Digestive System. Ingestion Mechanical processing Digestion Secretion Absorption Excretion. 4 Distinct tissue layers. Mucosa Submucosa Serosa Muscularis externa Longitudinal Transverse (circular). Alimentary Canal C.S.

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The Digestive System Laboratory

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  1. The Digestive SystemLaboratory

  2. Overview

  3. Function of the Digestive System Ingestion Mechanical processing Digestion Secretion Absorption Excretion

  4. 4 Distinct tissue layers • Mucosa • Submucosa • Serosa • Muscularisexterna • Longitudinal • Transverse (circular) Alimentary Canal C.S.

  5. The alimentary canal consists of four layers. Listed from outside to inside: 1) the fibroserousouter covering; serous in most of GI tract, fibrous in esophagus. 2) the muscularis(externa), smooth muscle (except in upper esophagus) in two or three layers; 3) the submucosa, containing glands, nerves, and blood vessels; 4) the mucosa, the epithelial secretoryand absorptive lining, bounded by the muscularismucosae (mm).

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