Human reproduction
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Human reproduction

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Human reproduction Human reproduction Presentation Transcript

  • HUMAN REPRODUCTION Biology and Geology Ana Isabel Marchal Martínez
  • Reproduction in living beings
    • Reproduction consist of the capacity of living beings to origininate new individuals.
  • Types of reproduction
    • ASEXUAL REPRODUCTION
    • SEXUAL REPRODUCTION
  • Sexuality in human beings.
    • What is the WHO ?
    • How defines the WHO the sexual health?
    • Have a look in your book… and answer the question…
  • Characteristics of human reproduction.
    • Human reproduction is…
    • sexual.
    • When the…
    • ovum and the…
    • spermatozoid are joined it is formed
    • the zygote , which forms an…
    • embryo .
    • The union of these cells is called…
    • fertilisation .
    • The ovum is formed in the…
    • ovary
    • And the spermatozoid in the… testicles .
    • Both of them are called…
    • gametes.
  • Changes during growth
    • Primary sexual characteristics: Present at birth.
      • Female genitalia
      • Male genitalia.
    • Secondary sexual characteristics: appears in the maturity.
    • This changes occurs during a very specifc age which is known as puberty and are the result of the action of sexual hormons.
  • Changes during puberty
    • In the female:
      • Pubic hair and hair under the arms.
      • Distribution of body fats.
      • Development os mammary glands.
    • In the male:
      • The development of public hair.
      • The beard and hair over a large part of the body.
      • An increase in the bones and muscles, change of voice, etc.
  • Diagram of human reproduction.
  • Reproductive organs and cells
    • The female reproductive apparatus
    • The ovaries
    • The falopian tubues
    • The uterus
    • The womb
    • The vagina
  • Reproductive organs and cells
    • The male reproductive apparatus
    • The testicles
    • The epididymis
    • The vas deferens
    • The seminal vesicles
    • The prostate
    • The urethra
    • The penis/ glans / prepuce
  • The reproductive cells
    • The ovum
    • The spermatozoids
  • What are the sexual hormones?
    • The ovaries and the spermatozoids produce substances known as hormones.
    • This hormones are known as sexual hormones.
    • Estrogens are produced in the ovary and are the female sexual hormond.
    • Androgens are produced in the testicles and are the male sexual hormond.
  • Changes during puberty
    • Between 10 and 12 years old in girls
    • Ovaries start to produce ova: ovulation.
    • It starts the fuctioning of the menstrual cycle and appearance of the female secondary characteristics.
    • In the case of boys is later.
    • This mark the beginning of the formation of sexual hormond in the female by the ovary.
  • Sexual maturity
    • Once puberty has passed, both male and female are sexually mature people and capable reproduction .
    • In women, a cyclical activity in ovary is produced with the maturity of the ovum every 28 days.
    • This changes occur until the age of 50, when menstruation becomes irregular and finally disappears. This period is known as menopause or climatery.
  • The menstrual cycle
    • FILMS
    • http://www.youtube.com/watch?v=yjKp5A4S0gc&feature=related MENSTRUATION
    • http://www.youtube.com/watch?v=EISG2NKDKT0&feature=related MENSTRUATION CRAMPS
  • The menstrual cycle
    • Complete the menstrual cycle as for the first day of menstruation.
    • On what days of the cycle is the endometry prepared for receiving a fertilised ovum?
    • On what day of the cycle does the ovum pass a long the Fallopian tube?
    • On what day of the cycle is there more chance os fertilisation?
  • Fertilisation
    • Fertilisation is the union between an ovum and a spermatozoid to form an egg cell or zigote from which a new individual will be formed.
    AFTER 4 OR 5 DAYS SOME SPERMATOZOIDS DIE.
  • Pregnancy
    • The installation of the embryo on the walls of the placenta is known as nesting. (7 days).
    • The embyo is sorrounded by the chorion. What is the chorion???
    • The chorion grows and link with the endometry forming the placenta.
    • The placenta is the area of union between the embryo and the mother.
  • Birth
    • FILM
    • http://www.youtube.com/watch?v=u9xfu1qOJzs&feature=related CHILDBIRTH
    • DILATATION OF THE UTERINE NECK
    • EXPULSION OF THE FOETUS
    • EXPULSION OF THE PLACENTA.
  •