proctodeum


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Related to proctodeum: proctodynia

proctodeum

 [prok″to-de´um]
the ectodermal depression of the caudal end of the embryo, which becomes the anal canal; called also anal pit.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

proc·to·de·um

, pl.

proc·to·de·a

(prok'tō-dē'ŭm, -dē'ă),
1. Terminal portion of the insect alimentary canal, extending from the pylorus (area of malpighian tubule attachment) to the anal opening; in certain diptera (flies) and other insects, the proctodeum is divided into a tubular anterior intestine and an enlarged posterior intestine, or rectum, ending at the anus.
2. Synonym(s): anal pit
[L. fr. G. prōktos, anus + hodaios, on the way, fr. hodos, a way]
Farlex Partner Medical Dictionary © Farlex 2012

proctodeum

also

proctodaeum

(prŏk′tə-dē′əm)
n. pl. procto·dea (-dē′ə) or procto·deums also procto·daea (-dē′ə) or procto·daeums
An inward fold on the surface of the embryonic ectoderm that develops into part of the anal passage.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

a·nal pit

(ā'năl pit)
1. An ectodermally lined depression under the taillike caudal eminence adjacent to the terminal part of the embryonic hindgut; at its bottom, proctodeal ectoderm and cloacal endoderm form the cloacal plate. When this epithelial plate ruptures, the anal and urogenital external orifices are established.
Synonym(s): proctodeum.
2. Terminal portion of the insect alimentary canal.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
These beetles have a typical digestive system divided into three regions: stomodeum, mesenteron and proctodeum. These regions have a tubular form and ate associated with numerous tracheae that facilitate gas exchange.
The additional engrailed stripes seven to nine lie clearly in front of the telson anlage, which is characterized by the proctodeum and which lacks engrailed expression.
It represents the embryologic junction between the cloaca proximally and the proctodeum distally.