Sexxual Reproductions Essay

266 WordsJan 28, 20132 Pages
Sexual reproduction in humans Sexual reproduction starts when the men ejaculates sperms from their testes into the woman's vagina while having sexual intercourse. The sperm travels through the vagina and cervix into the uterus or Fallopian tubes for fertilization of the ovum. Upon fertilization and implantation, gestation of the fetus then occurs within the female's uterus. The process of fertilization involves a sperm fusing with an ovum. Upon encountering the ovum, the sperm burrows through the outer jelly coat of the egg. The sperm plasma then fuses with the egg's plasma membrane, the sperm head disconnects from its body (tail) and the egg travels down the Fallopian tube to reach the uterus. That other process, is called implantation. The female counterpart is now pregnant. The embryo develops into a fetus in the first 8 weeks or so when the female is preganant. Pregnancy lasts for an average nine months, which the baby is developing inside the female's womb. the growing fetus relys on the mother for food and water which is transported to the baby's belly button through the umbilical cord. 1st week-4th week after fetilization. (formation of arms and legs) 5th week- 8th week after fertilization.( nose, ears and fingers are visually seen) 9th week to 18th week after fertilization (the embyro looks like a baby. it is now a foetus) 19th week to 38th week after fetilization. ( The foetus now looks more like a human baby.) After the period of pregnancy, the muscles of the uterus contract to push out the fully formed baby. If successful, the female has finally given

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