Small Intestine Anatomy

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<p>Brunner's glands (A)</p> Signup and view all the answers

<p>Very thin layer of cells (A)</p> Signup and view all the answers

Primary site for the breakdown of food using enzymes.

Marks the end of the small intestine.

Released in response to acidic stimuli in the duodenum; stimulates pancreatic secretions.

Glands in the duodenum that secrete mucus, protecting it from stomach acid.

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A very thin layer of cells in the duodenum wall.

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The small intestine is 2.5cm wide and 6m long, occupying most of the abdominal space.

The small intestine has three parts: duodenum, jejunum, and ileum.
It begins at the pyloric sphincter and ends with its connection to the large intestine at the ileocaecal valve.

The duodenum is primarily responsible for breaking down food in the small intestine using enzymes.
Brunner's glands, which secrete mucus, are found in the duodenum.
The duodenum wall consists of a thin layer of cells that form the muscularis mucosae.
The duodenum is almost entirely retroperitoneal.

The duodenum regulates the rate of emptying of the stomach via hormonal pathways.
Secretin and cholecystokinin are released from cells in the duodenal epithelium in response to acidic and fatty stimuli.
These hormones are released when the pylorus opens and releases gastric chyme into the duodenum for further digestion.