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Human Reproduction
 

Human Reproduction

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Human reproduction; anatomy, cells, hormones, pregnancy.

Human reproduction; anatomy, cells, hormones, pregnancy.

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Human Reproduction Human Reproduction Presentation Transcript

  • Human Reproduction
  • adolescence BOYS GIRLS Testes start to produce sperm Ovaries start to release eggs Testes start to produce androgens(testosterone) Ovaries start to produce estrogen and progesterone Hair grows on the face, chest and armpits Menstruation starts Voice deepens Breast get larger Behaviour changes Behaviour changes Pubic hair grows Pubic hair grows
  • Three Primary Hormones of Sexual Development
    • Estrogen
    • Progesterone
    • Testosterone
  • Male anatomy
  • Male gametes
    • Male gametes, very large numbers
    • 100 million sperm per ejaculation
    • smaller
    • Motile (if they can propel themselves, mobile if they can be easily moved)
  • Female anatomy
  • Female gametes
    • Female gametes ( ova or eggs in animals, ovules in plants)
    • Fairly small numbers.
    • Human females for example release about 500 ova in a lifetime.
    • Larger
    • Stationary
    • They often contain food reserves (lipids, proteins, carbohydrates) to nourish the embryo after fertilisation
  • Basic lifecycle of sexually reproducing organisms
  • Meiosis
  • Hormones
  • Levels of hormones The changing levels of the female sex hormones control the different stages of the menstrual cycle
  • Having a baby
  • Fertilisation
  • Fertilisation
  • Pregnancy