객관식
What are the three main components of gastric juice?
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23. The Digestive System
Introduction to the Digestive System
객관식
Which of the following is the name for the slippery outer layer of the alimentary canal?
A
Mucosa
B
Submucosa
C
Serosa
D
Muscularis externa
검증된 단계별 안내1
Understand the structure of the alimentary canal: The alimentary canal is composed of several layers, each with specific functions. These layers include the mucosa, submucosa, muscularis externa, and serosa.
Define the mucosa: The mucosa is the innermost layer of the alimentary canal. It is responsible for secretion, absorption, and protection. It is not the slippery outer layer.
Define the submucosa: The submucosa lies beneath the mucosa and contains connective tissue, blood vessels, and nerves. It provides support and elasticity but is not the outermost layer.
Define the muscularis externa: The muscularis externa is a layer of smooth muscle responsible for peristalsis and segmentation. It is located beneath the serosa and is not the outermost layer.
Define the serosa: The serosa is the slippery outer layer of the alimentary canal. It is composed of a thin layer of connective tissue covered by a layer of epithelial cells, which secrete a lubricating fluid to reduce friction between organs.
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