Muscularis is responsible for gut peristalsis. Thus option c and D are correct.
What are the major layers of GI tract wall ?
The wall of the GI tract has four layers.
Firstly, the mucosa which is the innermost layer of mucous membrane.
It is composed of three types of tissues such as epithelial, connective and smooth muscular tissue. It provide protection, secretion and absorption
Secondly, the submucosa consists of blood and lymphatic vessels. It also have a network of neurons called as the submucosal plexus.
Thirdly, the muscularis contains skeletal muscle and smooth muscle. It involve in voluntary swallowing and forms the external sphincter for the voluntary regulation of defecation.
Lastly, serosa a superficial layer made up of areolar connective tissue and simple squamous epithelium. It forms a portion of the peritoneum,, so called as visceral peritoneum.
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