Which are tunics (layers) that make up the gastrointestinal wall?

Biology

1 answer:

AlekseyPX1 year ago

3 0

The gastrointestinal wall is composed of four layers or tunics:

Mucosa
Submucosa
Muscularis mucosa
Serosa

The innermost tunic of the wall is known as the mucosa or mucous membrane layer. The digestive tract's lumen is lined with it. The mucosa comprises epithelium, a layer of lamina propria, a loose layer of connective tissue, and the muscularis mucosa, a thin layer of smooth muscle.

The mucosa is surrounded by a substantial layer of loose connective tissue known as the submucosa. Blood arteries, lymphatic vessels, and neurons are also present in this stratum. The adventitia is a connective tissue that makes up the digestive tract's outermost layer above the diaphragm. It is referred to as serosa below the diaphragm.

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