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Human reproduction by Paula Crespo
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Human reproduction by Paula Crespo

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  • 1. SCIENCE Paula Crespo González HUMAN REPRODUCTION
  • 2. REPRODUCTION  Reproductive is a life process that lets living things create other living things that are similar to them . Human beings have a sexual reproduction in which male and female sex cells unite Humans are viviparous mammals
  • 3. PRIMARY SEXUAL FEATURES  Primary sexual features are the traits that characterise the male and female reproductive systems . The different traits of each reproductive systems are called primary sexual features.
  • 4. Secundary sexual features  Secundary sexual features develop during puberty . There are other changes that are specific to each sex: - Girls develop breats and their hips get wider. - Boys get deeper voices ,they get facial hair and their shoulders get wider.
  • 5. Reproductive cells - Ovules : They are female Reproductive cells . They are big and round . - Sperm: they are male reproductive cells.They are small.
  • 6. Female reproductive system  Ovaries: They produce ovules  Uterus: A foetus develops inside it  Vagina: it is the canal that connects the uterus to the outside of the body  Vulva: It is the outer part of the female reproductive system. It is made up of folds of skin called labia that protect the entrance to the vagina  Fallopian tubes: They connect the ovaries to the uterus
  • 7. Female reproductive system
  • 8. Male reproductive system  Testicles: They are outside a male’s body . They produce sperm.  Vas deferents: They are two thin tubes that take the sperm from the tescicles to the urethra . They are inside the abdomen  Uretha: it is the tube that takes urine or sperm outside the body.  Penis :It is outside the male reproductive system .the urethra is inside it  Seminal vesical and prostate: They are glands that produce seminal fluid and send to the urethra
  • 9. Male reproductive system
  • 10. Fertilisation  Fertilisatin is the union of sperm and ovule in one of the Fallopian tubes. Menstruation occurs if the ovule is not fertilised
  • 11. The develop of an embryo  During the early stages of pregnancy, different structures are created to protect the baby: - The placenta.It is a spongy organ that is connected to the wall of the uterus. -The umbilical cord.It is made up of blood vessels an d connects the embryo to the placenta. -The amniotic sac.it is a membrane filled with fluid that protects the embryo.
  • 12. The development of an embryo
  • 13. E N D  By Paula Crepo