The Oral Cavity,pharynx,esophagus,and Rectum Have an Adventitia in Place of The

Question

The oral cavity,pharynx,esophagus,and rectum have an adventitia in place of the
A)mucosa.
B)lamina propria.
C)serosa.
D)muscularis externa.
E)submucosa.

Accepted Answer

The adventitia is a layer of connective tissue that supports and anchors an organ to surrounding structures, but it is missing the serous layer found on organs that are suspended in a body cavity. Therefore, the oral cavity, pharynx, esophagus, and rectum have an adventitia instead of a serosa. The mucosa, lamina propria, muscularis externa, and submucosa are all present in these organs.