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Invagination   Listen
noun
Invagination  n.  
1.
(Biol.) The condition of an invaginated organ or part.
2.
The inward movement of the wall of a tissue or cell, to form a cavity; also, the cavity thus formed.
3.
Specifically: (Biol., Embryology) The inward movement of one part of the wall of a blastula, to form a gastrula; the process of gastrulation, in which layers of the ovum are differentiated. Note: In embolic invagination, one half of the blastosphere is pushed in towards the other half, producing an embryonic form known as a gastrula. In epibolic invagination, a phenomenon in the development of some invertebrate ova, the epiblast appears to grow over or around the hypoblast.





Collaborative International Dictionary of English 0.48


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"Invagination" Quotes from Famous Books



... circumstances which require that this should be opened, and the state of its contained parts examined, prior to the replacement of the bowel in the abdomen. If the bowel were adherent to the neck of the sac, we might, when trying to reduce it by the taxis, produce visceral invagination; or while the stricture is in the neck of the sac, if we were to return this and its contents en masse (the "reduction en bloc") into the abdomen, it is obvious that the bowel would be still in a state of strangulation, though free of the internal ring or other opening ...
— Surgical Anatomy • Joseph Maclise
... the back and cooling the front in this way. The patient may be put at once into a sitting bath or small tub, and a panful of cold water poured or dashed on to the bowels; they then contract so powerfully, and shorten themselves so much, that all invagination, as it is called, is made to cease instantly. We should be disposed to try the mildest method in the first instance, unless the case is one in which the lock in the bowels had just taken place. Then it might be well to dash the pailful of water on ...
— Papers on Health • John Kirk


Words linked to "Invagination" :   infolding, invaginate, organic process, introversion, condition, biological process


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