Question

which is the outermost layer of the alimentary canal wall present in regions within the abdominal cavity?
a.) mucosa
b.) submucosa
c.) serosa
d.) adventitia

Explanation:

The alimentary canal wall has several layers. The serosa is the outermost layer in regions within the abdominal cavity. Mucosa is the innermost layer. Submucosa is beneath the mucosa. Adventitia is similar to serosa but is present in regions not covered by serosa (like parts of the esophagus).

Answer:

C. Serosa