Erect penis enters similarly blood-engorged vagina and ejects semen, four milliliters with 3 x 10^8 sperm, by epididymis, vas deferens, and urethra involuntary-muscle orgasm contractions {copulation} {intercourse}|. Only human females can have orgasms in clitoris and/or vagina and uterus. Sperm travel {motile} by tail movements and uterus contractions to oviduct tops. Sperm live 24 to 48 hours. Eggs live 24 to 78 hours.
Biological Sciences>Zoology>Organ>Reproduction>Intercourse
4-Zoology-Organ-Reproduction-Intercourse
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Date Modified: 2022.0224