The mature sperm cell spermatozoa is 0. It consists of a head, body and tail. The head is covered by the ac cap and contains a nucleus of dense genetic material from the 23 chromosomes. It is attached from the neck to the body containing mitochondria that supply the energy for the sperm's activity. The tail is made of protein fibers that contract on alternative sides, giving a characteristic wavelike movement that drives the sperm through the seminal fluid, which also supplies additional energy.
STD Risk and Oral Sex – CDC Fact Sheet
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Index What is a butterfly? What is the difference between a butterfly and a moth? What type of life cycle does a butterfly have? What are some butterfly activities that are commonly observed?
Ejaculation is the climactic point of male sexual arousal. During ejaculation, semen is ejected from the penis. How ejaculation occurs, what makes up semen , and how semen is produced are common questions.