Spermatozoon

A sperm cell, spermatozoon (pl. spermatozoa) (in Greek: sperma = semen and zoon = alive), or spermatozoan, is the haploid cell that is the male gamete. It is carried in fluid called semen, and is capable of fertilising an egg cell to form a zygote. A zygote can grow into a new organism, such as a human being.

The acrosome reaction

The female ovum is coated in a thick protective membrane. When a sperm cell reaches the egg the acrosome releases its enzymes. These enzymes break down the cell membrane, allowing the sperm cell passage into the egg. Upon penetration the membrane undergoes a change and becomes inpenetratable, preventing further fertilization of the ovum.

Related Topics:
Ovum - Membrane - Fertilization

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