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In the wall of alimentary canal, what is the actual sequence from outer to inner? |
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a) |
Serosa, longitudinal muscle, mucosa, submucosa |
b) |
Mucosa, serosa, longitudinal muscle |
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c) |
Serosa, longitudinal muscle, circular muscle, submucosa, mucosa |
d) |
Serosa, longitudinal muscle, submucosa, mucosa |
|
In the wall of alimentary canal, what is the actual sequence from outer to inner? |
|||
|
a) |
Serosa, longitudinal muscle, mucosa, submucosa |
b) |
Mucosa, serosa, longitudinal muscle |
|
c) |
Serosa, longitudinal muscle, circular muscle, submucosa, mucosa |
d) |
Serosa, longitudinal muscle, submucosa, mucosa |
(c)
The wall of alimentary canal is made up of four basic layers. First of all, there is serosa, which is a thin membranous covering around oesophagus. Then, there is muscle layer-outer layer of longitudinal muscles and inner layer of circular muscles. Last, there is submucosa, which contains a few oesophageal glands. Then comes mucosa, which has several layers of flattened cells.