Question

Figure depicts microsopic structure of the intestinal wall of alimentary canal. Study the figure and answer the following question?
(i) The wall of alimentary canal consists of 4 main concentric coats labelled as 1,2,3 and 4. Name these coats.
(ii) The coat marked 2 has two layers marked as 5 and 6. Between these two layers is a network of nerve cells and para-sympathetic nerve fibres called..... It controls the .......
(iii) The coat marked 3 is highly vasucular connective tissue having another network of nerve cells and sympathetic nerve fibres called...... . it controls the secretion of ........
(iv) Name the parts labelled as 7 and 8

Answer 1

(i) 1. vescral peritoneum or serosa. 2. Muscular coat. 3. Sub-mucosa 4. Mucosa or mucous membrane.
(ii) Plexus of aueback of myoentric plexus, muscular contractions.
(iii) Plexus of Meissner or submucosal plexus, intestinal juice.
(iv) 7. Lamina propria 8. villi