Wikipedia

Invagination

Invagination means to fold inward or to sheath. In biology, this can refer to a number of processes.

*Invagination is the morphogenetic processes by which an embryo takes form, and is the initial step of gastrulation, the massive reorganization of the embryo from a simple spherical ball of cells, the blastula, into a multi-layered organism, with differentiated germ layers: endoderm, mesoderm, and ectoderm. More localized invaginations also occur later in embryonic development, to form coelom, etc.

*Invagination is the formation of a cleavage furrow during cytokinesis in animal cells.

*The inner membrane of a mitochondrion invaginates to form cristae, thus providing a much greater surface area to accommodate the protein complexes and other participants that produce ATP.

*Invagination occurs during endocytosis and exocytosis when a vesicle forms within the cell and the membrane closes around it.

In the humanities:

*Used to explain a special kind of meta narrative. Used by Rosalyn Krauss and Jacques Derrida ("The Law of Genre", Glyph 7 (1980).


Look at other dictionaries:

  • embolic invagination — Ivagiatio I vag`i a"tio, . [L. pref. i- + vagia sheath.] [1913 Webster] 1. (Biol.) The coditio of a ivagiated orga or part. [1913 Webster] 2. The iward movemet of the wall of a tissue or cell, to form a cavity; also, the cavity… (The Collaborative International Dictionary of English)
  • epibolic invagination — Ivagiatio I vag`i a"tio, . [L. pref. i- + vagia sheath.] [1913 Webster] 1. (Biol.) The coditio of a ivagiated orga or part. [1913 Webster] 2. The iward movemet of the wall of a tissue or cell, to form a cavity; also, the cavity…
  • Invagination — Ivagiatio I vag`i a"tio, . [L. pref. i- + vagia sheath.] [1913 Webster] 1. (Biol.) The coditio of a ivagiated orga or part. [1913 Webster] 2. The iward movemet of the wall of a tissue or cell, to form a cavity; also, the cavity…
  • invagination — 1> _мед. впячивание, внедрение, инвагинация 2> _мед. вправление грыжи… (Новый большой англо-русский словарь)
  • invagination — f1) впячивание; инвагинацияinvagination de l'intestin заворот кишок2) гаструляция… (Большой французско-русский и русско-французский словарь)
  • Invagination — Ivagiatio ist ei Begriff aus der Biologie ud der Medizi. Er wird als Beschreibug für die Eistülpug eies Bestadteils i eie adere beutzt. Im Eizele bezeichet die Ivagiatio:i der Zytologie die Eistülpug vo Zell oder… (Deutsch Wikipedia)
  • Invagination Intestinale Aiguë Du Nourrisson — Ivagiatio itestiale Ivagiatio itestiale CIM 10 : K388, K561 Ue ivagiatio itestiale (ou itussusceptio itestiale) est l'icorporatio d'u segmet d'itesti das la portio itestiale située plus e aval. Cela coduit à… (Français Wikipedia)
  • Invagination intestinale — Ivagiatio itestiale Ivagiatio itestiale CIM 10 : K388, K561 Ue ivagiatio itestiale (ou itussusceptio itestiale) est l'icorporatio d'u segmet d'itesti das la portio itestiale située plus e aval. Cela coduit à…
  • Invagination intestinale aigue du nourrisson — Ivagiatio itestiale Ivagiatio itestiale CIM 10 : K388, K561 Ue ivagiatio itestiale (ou itussusceptio itestiale) est l'icorporatio d'u segmet d'itesti das la portio itestiale située plus e aval. Cela coduit à…