Process of Digestion

The surface epithelium has microvilli on the surface, called a brush border, which increases the surface argona for absorption yet more.

The first graphic symbol of the small intestine is called the duodenum, and it receives the chyme from the stomach, as hygienic as secretions from the liver and pancreas (digestive enzymes) (Applegate, 2000, 338-339). It has mucous glands in the submucosa. The second part of the small intestine is the jejunum, and the third portion is the ileum. These two areas are not distinctly separated, and there is a gradual return in the consider and length of the villi and an increase in the number of goblet cells beginning in the jejunum and ending in the ileum. enteral glands let go large amounts of watery fluid that is alkaline or neutral in pH to neutralize the acid chyme, and permit an appropriate environment for the chemical reactions of digestion and a fluid mediocre for absorption.

Goblet cells throughout the intestin

and duodenal glands in the submucosa of the duodenum secrete mucus: the alkaline mucus protects the intestinal wall from the acid chyme and digestive enzymes (Applegate, 2000, 339).

The microvilli of the intestinal epithelium cells sway digestive enzymes - peptidase, maltase, sucrase, lactase, intestinal lipase, and enterokinase, which activates a protein-splitting enzyme from the pancreas. Intestinal cells besides secrete secretin, which has a high bicarbonate ion concentration and helps neutralize chyme (340). They also secrete cholecystokinin, which stimulates muster out of bile from the gall bladder and the release of digestive enzymes from the pancreas. It also inhibits gastric mobility and secretions.

Philadelphia, PA: W. B. Saunders Company.

Applegate, E. (2000). The Anatomy & Physiology development System.

Starch is the storage form for energy in establishs; animal starch is the energy storage form in animals - liver and muscle cells can combine glucose molecules to form glycogen for storage; and fiber, which comes from plant sources, represents numerous polysaccharides
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