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The outer wall of the oesophagus is not lined by the serous membrane. Instead, it contains

 

Option: 1

Adventitia externa


Option: 2

Lamina propria


Option: 3

Adventitia interna


Option: 4

Muscularis tunica

 


Answers (1)

best_answer

 

 

As we have learnt in Serosa: It is present only in the region of the alimentary canal within the abdominal cavity. Instead of serosa, the mouth, pharynx, and oesophagus have a dense sheath of collagen fibres called the adventitia.
 

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So,

The outer wall of the oesophagus is not lined by serous membrane, The outer wall is seen in the form of an irregular coat of yellow elastic dense fibrous connective tissue called adventitia externa or tunica adventitia. Hence, the correct answer is option a.

Posted by

shivangi.bhatnagar

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