The innermost layer of the alimentary canal is referred to as the ________.

Question

Quizplus · Accepted Answer

The innermost layer of the alimentary canal, which comes into direct contact with food, is the mucosa. The mucosa contains various cells and glands that secrete digestive enzymes and mucus to aid in digestion and protect the lining of the canal. Choices A, B, and D refer to other layers of the alimentary canal - the serosa is the outermost layer, the submucosa is a layer that contains blood vessels and nerves, and the muscularis externa is a layer of smooth muscle that contracts to move food through the canal.

The Innermost Layer of the Alimentary Canal Is Referred to as the ________