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Human Sexual Anatomy & Physiology

Human Sexual Anatomy & Physiology. Human Sexuality Psychology 123 - Professor J.B. Pryor. Prenatal Sexual Differentiation. Genetic Factors. Initially, there are more males than females. Prenatal Sexual Differentiation. Gonads - [become] -> Testes or Ovaries

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Human Sexual Anatomy & Physiology

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  1. Human Sexual Anatomy & Physiology Human Sexuality Psychology 123 - Professor J.B. Pryor

  2. PrenatalSexualDifferentiation Genetic Factors

  3. Initially, there are more males than females

  4. Prenatal Sexual Differentiation Gonads -[become]-> Testes or Ovaries In males, at 7th week, outer portions of gonads degenerate and inner portions develop into testes In females, at 11th week, inner portions of gonads degenerate and outer portions develop into ovaries

  5. Prenatal Sexual Differentiation Gonads -[become]-> Testes or Ovaries Testes - endocrine glands that produce • male hormones (androgens) • Mullerian Inhibiting Substance Most changes reflect the presence or absence of androgen

  6. Prenatal Sexual Differentiation Wolfian Ducts - later become • epididymes • vasa deferentia • seminal vesicles

  7. Wolfian Ducts develop into Male Anatomy

  8. Prenatal Sexual Differentiation Gonads -[become]-> Testes or Ovaries Ovaries- endocrine glands that produce • female hormones (e.g.estrogen)

  9. Prenatal Sexual Differentiation Mullerian Ducts - later become • uterus • fallopian tubes • upper part of vagina

  10. Mullerian Ducts develop into Female Anatomy

  11. Undifferentiated External Genitalia (<7 weeks) genital tubercle urethral fold & groove

  12. Partially differentiated external male & female genitalia

  13. Fully developed male & female external genitalia

  14. Fetal external genitals: female 11-12 weeks 19 weeks

  15. Fetal external genitals: female 5 months

  16. Fetal external genitals: male 15 weeks 16 weeks

  17. Fetal external genitals: male 5 m o n t h s

  18. Hormonal Changes in Hypothalamus FSH- RF LH- RF Puberty Anterior Pituitary

  19. OVARIES TESTES Hormonal Changes in Hypothalamus FSH- RF LH- RF Puberty Anterior Pituitary FSH FSH LH ICSH(LH)

  20. OVARIES TESTES Hormonal Changes in Hypothalamus FSH- RF LH- RF Puberty Anterior Pituitary FSH FSH LH ICSH(LH) Ovulation Corpus Luteum Ovum Growth Testosterone Spermatogenesis Progesterone Estrogen

  21. Changes in Puberty

  22. Female Sexual Anatomy Two Plates by Judy Chicago

  23. External Female Sexual Anatomy • Vulva • Mons • Labia Majora • Labia Minora • Bartholin’s Glands • Clitoris • inside - 2 corpora cavernosa • Hymen

  24. clitoris mons labia majora labia minora vestibule External Female Anatomy Bartholin’s glands

  25. Clitoris

  26. Variations in Labia

  27. Internal Female Anatomy • Ovaries • Uterus - back - fundus - front - cervix • Layers of Uterus • perimetrium • myometrium • endometrium

  28. Ovaries & Fallopian Tubes fundus fallopian tube ovary cervix uterine cavity top of vagina

  29. Close-up of an ovary

  30. U t e r u s endometrium myometriun perimetrium cervix vagina

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