Answer
The lumen is the inner-most area of the gastrointestinal (GI) tract. This is where food is digested.
The mucosa is the inner mucous membrane layer of the GI tract. This layer is modified according to the digestive organ.
The submucosa is a broad band of loose connective tissue containing blood, nerves, and lymphatic vessels.
The muscularis is two layers of smooth muscle.
The serosa is the outer-most layer of the GI tract. It is the visceral peritoneum.
Work Step by Step
The lumen is the inner-most area of the gastrointestinal (GI) tract. This is where food is digested.
The mucosa is the inner mucous membrane layer of the GI tract. This layer is modified according to the digestive organ.
The submucosa is a broad band of loose connective tissue containing blood, nerves, and lymphatic vessels.
The muscularis is two layers of smooth muscle.
The serosa is the outer-most layer of the GI tract. It is the visceral peritoneum.
