MEDICAL
RECTUM AND ANUS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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peristalsis
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protection
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lubrication
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contains nerves and blood vessels
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Detailed explanation-1: -The submucosa is a thick layer of loose connective tissue that surrounds the mucosa. This layer also contains blood vessels, lymphatic vessels, and nerves.
Detailed explanation-2: -The extramural arterial supply for the oesophagus is derived from the thoracic aorta or its major branches. Blood supply to the abdominal organs is provided by three major unpaired vessels arising from the abdominal aorta, namely the coeliac trunk and the superior and inferior mesenteric arteries.
Detailed explanation-3: -The lymphatic vessels draining the mucosa and the muscularis empty into the submucosal network of collecting lymphatics. In the muscularis, the lymphatic vessels run close to blood vessels with frequent anastomoses with each other [6].