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diagram of a human spermatozoa. with special detail of the head. the diagram i did myself based on the one found on the book "Gray's anatomy" thirty sixth edition. williams&warwick 1980. and a diagram found of the review "Formation and organization of the
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Diagram of a human sperm cell. Sperm (pl.: sperm or sperms) is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger, female reproductive cell and a smaller, male one).
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Human_sperm_under_microscope.webm (WebM audio/video file, VP9, length 1 min 8 s, 640 × 480 pixels, 2.63 Mbps overall, file size: 21.26 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
The human sperm cell is the reproductive cell in males and will only survive in warm environments; once it leaves the male body the sperm's survival likelihood is reduced and it may die, thereby decreasing the total sperm quality. Sperm cells come in two types, "female" and "male".
At the peak of arousal (0:57), orgasm occurs and semen is ejaculated from the penis in a series of rhythmic contractions. (In this demonstration, there are 15 strong contractions followed by 10 weaker contractions). Once arousal has peaked (1:35), the penis returns to its flaccid state, the scrotum loosens, and the testicles descend.
Human fertilization is the union of an egg and sperm, occurring primarily in the ampulla of the fallopian tube. [1] The result of this union leads to the production of a fertilized egg called a zygote, initiating embryonic development. Scientists discovered the dynamics of human fertilization in the 19th century. [2]