Question

In the wall of the alimentary canal, which is the true sequence from the outermost to the innermost layers?

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

Answer 1

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

The wall of alimentary canal is made of four basic layers. First layer is the serosa which is a thin membranous covering around oesophagus. Then there is a muscle layer-outer layer of longitudinal muscles and inner layer of circular muscles. Last there is submucosa which contains a few esophageal glands. Then comes mucosa with several layers of flattened cells.