The sperm binds to the egg through another ligand reaction between receptors on the vitelline membrane.
13.
The sperm surface protein bindin, binds to a receptor on the vitelline membrane identified as EBR1.
14.
The proteases cleave the bridges connecting the plasma membrane and the vitelline membrane and cleave the bindin to release the sperm.
15.
Each worm has reproductive organs such as vas deferens, testis, uterus, vitelline duct, ovary, and vitellaria.
16.
The newly laid egg is hemispherical, delicate, heavily yolked, and enclosed in a single vitelline and triple jelly envelope.
17.
This constitutes the vitelline circulation, and by means of it nutritive material is absorbed from the yolk sac and conveyed to the embryo.
18.
In most animals, the extracellular matrix present around the egg is the vitelline envelope which becomes the fertilization membrane following the cortical reaction.
19.
It can be distinguished from its family by its symmetrical vitelline extent and arrangement, as well as forebody length and egg-size.
20.
This constitutes the vitelline circulation, and by means of it nutritive material is absorbed from the yolk-sac and conveyed to the embryo.
