A glycoprotein membrane surrounding the plasma membrane of an oocyte. It is a vital constitutive part of the latter, external but not extraneous to it. The zona pellucida first appears in multilaminar primary oocytes. [ http://en.wikipedia.org/wiki/Zona_pellucida ]
Term information
- TAO:0001111
- VHOG:0000720
- FMA:18674
- NCIT:C33896
- EMAPA:16035
- ZFA:0001111
- GAID:410
- EHDAA:31
- BTO:0003135
- MA:0001715
- EHDAA2:0002220
- EHDAA:62
- Wikipedia:Zona_pellucida
- UMLS:C0043519 (ncithesaurus:Zona_Pellucida)
- MESH:D015044
pheno_slim, vertebrate_core
A glycoprotein membrane surrounding the plasma membrane of an oocyte. It is a vital constitutive part of the latter, external but not extraneous to it. The zona pellucida first appears in multilaminar primary oocytes.
zona radiata
vitelline envelope
vitelline membrane
pellucid zone
zona striata
oolemma
striated membrane
Outside the plasma membrane, three envelopes surround the ovum. The first, the primary egg envelope, lies between the plasma membrane and the surrounding cells of the ovary. The most consistent component of this primary layer is the vitelline membrane, a transparent jacket of fibrous protein. In mammals, the homologous structure is called the zona pellucida.[well established][VHOG]
Term relations
- acellular anatomical structure
- anatomical entity
- part of some ovary
- has part some glycoprotein
- bounding layer of some oocyte
- part of some oocyte