Zoology - Human Reproduction Question with Solution | TestHub

The zona pellucida (ZP) is an important, integral structure for the egg both before and after fertilization. The zona pellucida (ZP) is a name given to a clear (lucid) zone or region that surrounds the unfertilized egg and works to keep out the additional sperm that hangs around after the first union. It even stays close to the developing cells after fertilization to help out along the road to implantation in the uterus or womb.