What are the layers of the colon?

What are the layers of the colon?

In most portions of the gastrointestinal tract, the bowel wall is comprised of four layers: the mucosa, submucosa, muscularis propria, and serosa.

What are 4 parts of the colon?

The colon is divided into 4 parts:

  • The ascending colon is the start of the colon.
  • The transverse colon follows the ascending colon and hepatic flexure.
  • The descending colon follows the transverse colon and splenic flexure.
  • The sigmoid colon is the last part of the colon and connects to the rectum.

How many layers does the colon have?

The intestinal wall is made up of multiple layers. The 4 layers of the large intestine from the lumen outward are the mucosa, submucosa, muscular layer, and serosa. The muscular layer is made up of 2 layers of smooth muscle, the inner, circular layer, and the outer, longitudinal layer.

What are the 5 layers of bowel?

The bowel wall has five layers, composed of alternating hyperechoic and hypoechoic appearances….Radiographic features

  • superficial mucosa: echogenic.
  • muscularis mucosa: hypoechoic.
  • submucosa: echogenic (this is the thickest layer 1)
  • muscularis propria: hypoechoic.
  • serosa: echogenic.

What is the submucosa of the colon?

Beneath the mucosa is the next major layer of the colon, the submucosa. This layer consists mostly of dense irregular connective tissue, but also contains blood vessels, lymphatic vessels, and the submucosal or meissner’s plexus.

What is cecum?

Listen to pronunciation. (SEE-kum) A pouch that forms the first part of the large intestine. It connects the small intestine to the colon, which is part of the large intestine.

What are Haustra?

The haustra of the colon (singular haustrum) are the small pouches caused by sacculation, which give the colon its segmented appearance. The taenia coli runs the length of the large intestine. Because the taenia coli is shorter than the intestine, the colon becomes sacculated between the taenia, forming the haustra.

What is the innermost layer of the colon?

mucosa
The colon is made of several layers of tissue. The innermost layer is called the mucosa. The next layers are the submucosa and muscularis propria. The next layer is the subserosa, and the final outermost layer is called the serosa.

What is mucosa and submucosa?

Mucosa — innermost layer (closest to the lumen), the soft, squishy lining of the tract, consisting of epithelium, lamina propria, and muscularis mucosae. Submucosa — connective tissue supporting (outside, deep to) the mucosa.