Lower 1/3'd of anal canal is derived from?
Ans. is'a'i.e., Proctodaeum(Ref: BDC Sh/eVol. Il p. 415)'The lower third of the anal canal is an ectodermal derivative and is derived from the proctodaeum.'Pa of anal canal above pectinate line develops from dorsal pa of md.odermal cloaca (primitive rectum) and pa of anal canal below pectinate line develops from ectodermal proctodeum.
Proctodaeum
Cloaca
Urogenital Sinus
Midgut