Question

Write the classification of egg membranes.​

Answer 1

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.

Answer 2

Two types of egg envelops are present on egg of insects. Inner - Vitelline membrane - Primary egg membrane. Outer - Chorion - Secondary egg membrane. ... (ii) Outer - Jelly coat - Tertiary egg membrane (Secreted by oviduct).