Question

In the wall of alimentary canal, what is the actual sequence from of layers from outer to inner?

• A. Serosa, longitudinal muscle, mucosa, sub mucosa
• B. Mucosa, serosa, longitudinal muscle
• C. Serosa, longitudinal muscle, circular muscle, submucosa, mucosa
• D. Serosa, longitudinal muscle, submucosa, mucosa

Answer 1

The correct option is C Serosa, longitudinal muscle, circular muscle, submucosa, mucosa

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 followed by submucosa, which contains a few oesophageal glands. Then comes mucosa, which has several layers of flattened cells.