9
Question
The lining of the intestinal wall from outside to inside is made up of:
The lining of the intestinal wall from outside to inside is made up of:
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Solution
The correct option is A Longitudinal muscles → circular muscles → submucosa → mucosa
The correct option is A.
Explanation of the correct answer:
- The layers of the gut are serosa, muscularis, submucosa and mucosa.
- The serosa is the outermost layer of connective tissues.
- Below it is the smooth mucosa which has an outer layer of longitudinal muscles and an inner layer of circular muscles.
- The submucosa is a loose connective tissue with nerves, lymphoid tissue, and blood vessels.
- The innermost layer is the mucosa which is an epithelial layer with no nerves.
Final answer: The lining of the intestinal wall from outside to inside is made up of serosa ⇢ longitudinal smooth muscle cells ⇢ circular smooth muscle cells ⇢ submucosa ⇢ mucosa.
Longitudinal muscles → circular muscles → submucosa → mucosa
The correct option is A.
Explanation of the correct answer:
- The layers of the gut are serosa, muscularis, submucosa and mucosa.
- The serosa is the outermost layer of connective tissues.
- Below it is the smooth mucosa which has an outer layer of longitudinal muscles and an inner layer of circular muscles.
- The submucosa is a loose connective tissue with nerves, lymphoid tissue, and blood vessels.
- The innermost layer is the mucosa which is an epithelial layer with no nerves.
Final answer: The lining of the intestinal wall from outside to inside is made up of serosa ⇢ longitudinal smooth muscle cells ⇢ circular smooth muscle cells ⇢ submucosa ⇢ mucosa.
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