invagination

invagination

 [in-vag″ĭ-na´shun]

1. the infolding of one part within another part of a structure, as of the blastula during gastrulation.

2. intussusception.

basilar invagination a developmental deformity of the occipital bone and upper end of the cervical spine in which the latter appears to have pushed the floor of the occipital bone upward; see also platybasia. Called also basilar impression.

in·vag·i·na·tion

(in-vaj'i-nā'shŭn),

1. The ensheathing, enfolding, or insertion of a structure within itself or another.
See also: introversion, intussusception.

2. The state of being invaginated.
See also: introversion, intussusception.

invagination

/in·vag·i·na·tion/ (in-vaj″ĭ-na´shun)

1. the infolding of one part within another part of a structure, as of the blastula during gastrulation.

2. intussusception.

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basilar invagination  a developmental deformity of the occipital bone and upper end of the cervical spine in which the latter appears to have pushed the floor of the occipital bone upward.

invagination

(ĭn-văj′ə-nā′shən)

n.

1. The act or process of invaginating or the condition of being invaginated.

2. An invaginated organ or part.

3. Embryology The infolding of a portion of the outer layer of a blastula in the formation of a gastrula.

invagination

[invaj′ənā′shən]

Etymology: L, in, within, vagina, sheath

1 a condition in which one part of a structure telescopes into another, as the intestine during peristalsis. If the invagination is extensive or involves a tumor or polyp, it may cause an intestinal obstruction, necessitating surgery.

2 surgery for repair of a hernia by replacement of the contents of the hernial sac in the abdominal cavity. General or spinal anesthesia may be used. See also hernia, intestinal obstruction, intussusception, peristalsis. invaginate, v.

in·vag·i·na·tion

(in-vaj'i-nā'shŭn)

1. The ensheathing, enfolding, or insertion of a structure within itself or another.

2. The state of being invaginated.
See also: introversion, intussusception

invagination

A folding into or ensheathing. The process of invagination occurs in the early development of the embryo when part of the BLASTODERM folds inward so that the hollow sphere becomes cup-shaped and double-walled.

invagination

an inpushing of a layer of cells, as in GASTRULATION or in the formation of the PROCTODAEUM.

in·vag·i·na·tion

(in-vaj'i-nā'shŭn)

Ensheathing, enfolding, or insertion of a structure within itself or another.

invagination

1. the infolding of one part within another part of a structure, as of the blastula during gastrulation.

2. intussusception.