What are the divisions of egg membrane?
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On the basis of origin, egg- membranes are divided into three parts
(1) Primary egg membrane: Oocyte secretes this membrane. Examples: Zona Pellucida, Vitelline membrane etc.
(2) Secondary egg membrane: This is seen outside the primary egg membrane & is secreted by the ovary. Examples: Chorion, corona radiata
(3) Tertiary egg membrane: This is present outside the primarveca membrane uterus or the oviduct. Examples: Jelly coat, Shell & Shell membrane.
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