part_of
part of
part of
has part
has part
has_part
bounding layer of
bounding layer of
material entity
material entity
glycoprotein
oocyte
zona pellucida
http://upload.wikimedia.org/wikipedia/commons/8/81/Gray3.png
UBERON:0000086
oolemma
uberon
vitelline membrane
ZFA:0001111
BTO:0003135
pellucid zone
EHDAA2:0002220
EMAPA:16035
EHDAA:31
striated membrane
zona striata
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]
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 pellucida - vitelline membrane
UMLS:C0043519
GAID:410
NCIT:C33896
zona radiata
TAO:0001111
FMA:18674
MESH:D015044
VHOG:0000720
MA:0001715
Wikipedia:Zona_pellucida
EHDAA:62
vitelline envelope
acellular anatomical structure
ovary