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Reproduction And Development
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Reproduction And Development

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  • 1. Reproduction and Development
  • 2. Reproductive system
    • Production of sex cells is controlled by hormones
    • In humans
      • Internal fertilization
      • Internal development
  • 3. Gamete Production
    • In females it occurs in the ovaries
    • In males it occurs in the testes
    • It is regulated by hormones
  • 4. Female Reproductive System
    • Ovaries
      • Eggs
      • Estrogen
      • Progesterone
    • Fallopian tubes
      • Site of fertilization
    • Uterus
      • Site of development
    • Cervix and Birth Canal
  • 5. Male Reproductive System
    • Testes
    • Epididymis
    • Vas Deferens
    • Prostate Gland
    • Cowper’s Gland
    • Seminal Vesicles
  • 6. Sperm
    • Head
      • Enzymes
      • DNA
    • Body
      • Mitochondria
    • Tail
      • Locomotion
  • 7. Hormones
    • Testosterone: Development of male secondary sex characteristics
    • Estrogen: Development of female secondary sex characteristics
    • Progesterone: along with estrogen, helps prepare uterine wall for pregnancy. Maintains uterine lining during pregnancy (pregnancy hormone)
  • 8. Hormonal Regulation of Reproduction
    • Hormones regulate the menstrual cycle
    • Estrogen thickens the uterine wall
    • Progesterone maintains that lining
  • 9. Menstrual Cycle
    • Ovulation: Release of the egg
    • Corpus Luteum: Yellow body, temporary endocrine structure, produces progesterone
    • Cycle repeats itself every 28 days.
  • 10. Fertilization
    • If sperm are present fertilization will occur in the fallopian tube.
    • Zygote starts to develop and implant itself in the uterine wall.
    • This is controlled by hormones also
  • 11. Early Development
    • Fertilization  Zygote  Embryo (3 rd week to 8 th week)  Fetus (8 weeks to birth)
  • 12. Development
    • Placenta
    • Umbilical cord
  • 13. 6 weeks
  • 14. 4 Months
  • 15. The First Few Months
    • The first few months are most critical
      • Cells differentiate
      • Organs form
    • Toxins from mother can affect development
      • Alcohol
      • Tobacco
      • Drugs
  • 16. Development Continues
    • After birth, cell differentiation and development continues to adulthood.
    • During adulthood, structures age.
    • Organism weakens and dies.
  • 17. Reproductive Technologies
    • Artificial insemination
    • Cloning
    • Cryopreservation
    • Embryo Transfer