Unit 4 human reproduction gonzalo s

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Unit 4 human reproduction gonzalo s

  1. 1. U 4 HUMAN REPRODUCTION BY GONZALO BARCELÓ
  2. 2. reproduction • Primary sexual characteristics are the reproductive system. We have them when we are born. • Secondary sexual characteristics are the external characteristics .During the time of puberty in the ages of 11 to 15 the reproductive system matures • Changes specific . Boy get deeper voices • Girls develop breast and their hips get wider
  3. 3. Reproductive cells • Sperm ova
  4. 4. Male reproductive sytem • Is made up of vas deferens, prostate seminal vesicles ,testicles ,urethra and penis
  5. 5. Female reproductive system • Is made up of : ovaries uterus fallopian tubes vagina vulva
  6. 6. Labour • The process of giving birth is labour .it has 3 phases Dilation Expulsion Afterbirth
  7. 7. Fertilisation Occurs when an ovum and a sperm join inside the Fallopian tubes and they create a single cell called a zygote.The zygote goes down the Fallopian tubes and it becomes an embryo, when it is implanted in the wall of the uterus PREGNANCY lasts about 9 months and ends in a birth.Different structures are created to protect the embryo: placenta , umbilical cord, amniotic sac.

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