2nd October 2019

nature
16

Is the esophagus made of smooth muscle?

The esophagus wall is composed of striated muscle in the upper part, smooth muscle in the lower part, and a mixture of the two in the middle.

Also, what type of cell is found in the esophagus?

Columnar epithelium, characteristic of the rest of the gut, consists of a single layer of tall, rectangular cells. In Barrett's esophagus, the normally squamous epithelium of the lower esophagus becomes replaced with various types of columnar cells, that may predispose to a type of cancer known as adenocarcinoma.

What makes up the esophagus?

The esophagus is a muscular tube connecting the throat (pharynx) with the stomach. The esophagus is about 8 inches long, and is lined by moist pink tissue called mucosa. The esophagus runs behind the windpipe (trachea) and heart, and in front of the spine. They keep food and secretions from going down the windpipe.
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