Lower l/3rd of anal canal is derived from-
Correct Answer: Cloaca
Description: Ans. is 'b' i.e., Proctodaeum * 'The lower third of the anal canal is an ectodermal derivative and is derived from the proctodaeum.'* Part of anal canal above pectinate line develops from dorsal part of endodermal cloaca (primitive rectum) and part of anal canal below pectinate line develops from ectodermal proctodeum.
Category:
Anatomy
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