Which one of the following parts of the GI tract has the following characteristics:simple columnar epithelium, muscularis mucosa, Meissners plexus, two layers of smooth muscle in the tunica muscularis and Peyers patches of lymph nodules?

GASTROINTESTINAL PHYSIOLOGY

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which one of the following parts of the GI tract has the following characteristics:simple columnar epithelium, muscularis mucosa, Meissner’s plexus, two layers of smooth muscle in the tunica muscularis and Peyer’s patches of lymph nodules?

A	duodenum
B	jejunum
C	ileum
D	colon

Explanation:

Detailed explanation-1: -The correct arrangement of the wall of the GI tract tissues from the outermost to innermost layers is C. serosa, muscularis, submucosa, mucosa.

Detailed explanation-2: -The inner surface of the small intestine is covered with a simple columnar epithelium exhibiting invaginations, known as the crypts of Lieberkuhn, which are comprised predominantly of proliferating cells, and finger-like projections called villi that contain the majority of differentiated absorptive cells [2, 6, 19].

Detailed explanation-3: -The stomach and intestines have a thin simple columnar epithelial layer for secretion and absorption. The submucosa is a thick layer of loose connective tissue that surrounds the mucosa. This layer also contains blood vessels, lymphatic vessels, and nerves. Glands may be embedded in this layer.

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