1. Which part of the sperm helps it in penetrating into ovum ?
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Acrosome
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Acrosome
The primary sex organ, the testis in males produce gametes i.e. sperms. Mature sperm cell consists of a head, a neck, a middle piece and a tail. A plasma membrane envelops the whole body of sperm. The sperm head contains a very little cytoplasm, an elongated haploid nucleus, the anterior portion of which is covered by a cap-like structure, acrosome. The acrosome is filled with enzymes that help in fertilization of ovum. These enzymes called sperm lysins that dissolve the membranes enveloping the ovum and help the sperm cell to enter the ovum by penetrating egg membrane. Acrosome is derived from golgi apparatus. Its membrane extends down the outer surface of nucleus.
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