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Title
Fertilization. Penetration sperm cell of the Egg #44005364
Description
Fertilization is the union of an ovum and a spermatozoon. When a sperm contacts the surface of an egg, it initiates metabolic reactions within the egg that trigger the onset of embryonic development. The acrosome releases enzymes to digest the zona pellucida. The plasma membranes of the two gametes fuse, allowing the whole sperm to enter the egg. The egg releases enzymes from cortical granules to