It is responsible for the absorption and digestion of nutrients.

Diagram of a plica circulares.

There are four main layers: Mucosa (Innermost layer) – Contains the epithelium, lamina propria and muscularis mucosae. The entire small intestine is relatively uniform throughout its length across the duodenum, jejunum, and ileum. Histology. The small intestine possesses all of the basic histological layers of the GI Tract (See: GI Tract Histology). Structure.
The digestive process is facilitated by the enzymes produced by the pancreas. ; Submucosa – Connective tissue layer, which contains blood vessels, lymphatics and the submucosal plexus. Histology Guide; Digestive; Small Intestine; Small Intestine . 1. Histology of small intestine 1. This is a diagram which shows the villi of the small intestine, as indicated by the arrows in the diagram above, at higher magnification. The histological structure of the small intestine is similar to the other organs in the digestive tract. Look at slide 162 first. The only major differential histology is the presence of Brunners Glands which solely appear in … It is the site for the absorption of amino acids, fats, glucose and some large molecules. To improve the efficiency of absorption, it is necessary to increase surface area.
Duodenum Slide 162 40x (pyloro-duodenal junct, H&E) WebScope ImageScope Slide 161 40x (pylorus, duodenum, pancreas, H&E) WebScope ImageScope. By Shizra Nizamani 2. The histology of the wall of the small intestine differs somewhat in the duodenum, jejunum, and ileum, but the changes occur gradually from one end of the intestine to the other. The main functions of the small intestine are digestion, absorption of food and production of gastrointestinal hormones.

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