sperm will penetrate egg to initiate fertilization Egg Able to live up to 24 hours Sperm able to live up to 72 hours Zona reaction: Membrane becomes impenetrable to other sperms b/c one sperm successfully penetrated the membrane Egg and sperm fusion Team effort to get to the egg, once the sperm gets to the egg, the other sperm backs off Whole structure of the developing embryo is known as the blastocyst Outer layer of cells surrounding the blastocyst cavity is the trophoblast Implantation Blastocyst…
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