Question

question 1
which is the innermost lining of the alimentary canal?
serosa
mucosa
adventitia
submucosa
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Explanation:

The alimentary canal has four layers. The innermost layer is the mucosa. It is responsible for functions like absorption and secretion. Serosa is the outermost layer. Adventitia is a connective - tissue layer (in some parts of the alimentary canal, like the esophagus). Submucosa is a layer of connective tissue that lies between the mucosa and the muscularis externa.

Answer:

Mucosa