cumulus oophorus


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Related to cumulus oophorus: corpus luteum, Graafian follicle, Discus proligerus

cumulus

 [ku´mu-lus] (pl. cu´muli) (L.)
a small elevation.
cumulus oo´phorus a mass of follicular cells surrounding the ovum in the vesicular ovarian follicle.

cu·mu·lus o·oph·'or·us

a mass of epithelial granulosa cells surrounding the oocyte in the maturing ovarian follicle.
[NA]

cumulus oophorus

A solid mass of follicular cells that surrounds the developing ovarian follicle. It projects into the antrum of the graafian follicle. After ovulation this layer of cells must be penetrated by a sperm for fertilization to occur.
Synonym: discus proligerus
See also: cumulus

cumulus

pl. cumuli [L.] a small elevation.

cumulus oophorus
a mass of follicular cells surrounding the ovum in the vesicular ovarian follicle. Called also discus oophorus, discus ovigerous, discus proligerous.
References in periodicals archive ?
En el grupo control solo 15% de los oocitos sufrio dano severo, con perdida total de las celulas del Cumulus oophorus, ademas, se aprecia la zona pelucida ovalada.
Meryman (Meryman HT 1971, Cryobiology 8: 489-500) propone que la congelacion no es mas que la remocion de agua pura de una solucion y su aislamiento en forma de cristales de hielo; con base en los resultados obtenidos en el presente trabajo es importante mencionar que las celulas del Cumulus oophorus danadas presentaron diferentes grados de desagregacion, habiendo edema y ruptura de la membrana mitocondrial, zona pelucida colapsada y expandida, lo que refleja no solo el impacto biologico, sino tambien efectos biofisicos, los cuales pueden deberse a cambios en la presion hidrostatica de las soluciones utilizadas, (Liebermann J, Nawroth F, Isachenko U, Rahimi G, Tucker MJ 2002, Biol Reprod 67: 1671-1680).
However, additional layers of cells exist at the cumulus oophorus, a pedestal of granulosa cells that support the oocyte.
In addition to inducing degradation of the apical follicular wall, the LH surge induces changes within the cumulus oophorus that are necessary for ovulation to occur.
Fertilization can be divided into five major steps: 1) passage of the sperm through the cumulus oophorus (in species where this structure is present at the time of fertilization), 2) binding between the spermatozoon and oocyte, 3) induction of the spermatozoon's acrosome reaction, 4) fusion of the spermatozoon and oocyte, and 5) activation of the oocyte.