proctodeum /proc·to·de·um/ (-de´um) the ectodermal depression of the caudal end of the embryo, where later the anus is formed.
proctodeum
proctodeum [prok″to-de´um]
proc·to·de·um or proc·to·dae·um (pr k t -d  m)n. pl. proc·to·de·ums or proc·to·de·a (-d -) or proc·to·dae·ums or proc·to·dae·a (-d-) An inward fold on the surface of the embryonic ectoderm that develops into part of the anal passage. Also called anal pit. |
proctodeum
[proktō′dē·əm] pl. proctodea
Etymology: Gk, proktos + hodiaos, a route
a depression of the ectoderm, behind the urorectal septum of the developing embryo, that forms the anus and anal canal when the cloacal membrane ruptures. Also spelled proctodaeum ( pl. proctodaea ). Compare stomodeum. proctodaeal, proctodeal, adj.
proctodeum [prok″to-de´um]
the ectodermal depression of the caudal end of the embryo, which becomes the anal canal; called also anal pit.
proctodeum, proctodaeum
the ectodermal depression of the caudal end of the embryo, which becomes the anal canal; called also anal pit, avian cloaca.
Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.
| ?Page tools | ||
|---|---|---|
|