Definitions
from The Century Dictionary.
- noun A posterior section of the alimentary canal or digestive tract, being so much of the whole intestine or enteric tube as is formed at the aboral end by an in growth of the ectoderm: correlated with stomodæum. which is derived from the ectoderm at the oral end—both being distinguished from
enteron proper, which is of endodermal origin. Alsoproctodeum . - noun The posterior division of the cloaca in such animals as birds, opening externally by the anus: correlated with
coprodæum andurodæum .
from the GNU version of the Collaborative International Dictionary of English.
- noun (Anat.) See
mesenteron .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Alternative spelling of
proctodeum .
Etymologies
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Examples
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An epiblastic tucking-in at st., the stomodaeum pre-figures the mouth; pr., the proctodaeum, is a similar posterior invagination which will become the anus.
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The anus is formed by a tucking in, the proctodaeum, similar to the stomodaeum.
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The part of the cloaca from the upper wall of which it forms belongs to the proctodaeum, the ectodermic invagination of the rectum (Chapter 2.27); hence its epithelial covering can develop the same horny growths as the corneous layer of the epidermis.
The Evolution of Man — Volume 2 Ernst Heinrich Philipp August Haeckel 1876
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