Sperm Cell
Normally one sperm fuse with egg plasma membrane and inject it’s nucleus into egg cytoplasm.
Hundreds of sperm attracted to corona radiata to begin to break barrier of granulosa cells and approach to zona pellucida.
Contact with zona pellucida trigger acrosome reaction, causing sperm to secrete digestive (Hydrolytic enzymes) that breakdown the glycoprotein membrane of zona pellucida and help to expose oocytes plasma membrane.
Hyaluronidase; helps penetrate outer membrane of ovum corona radiata and zona pellucida.
A single sperm succeed penetration through corona radiata and zona pellucida and making contact with oocyte plasma membrane.
The sperm plasma membrane fuse with plasma membrane oocyte and sperm releases nucleus into cytoplasm of oocyte.
Life span of sperm in female body; 72hours.
