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

2. Prenatal Sexual Differentiation
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: male5 m o n t h s

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

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

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

21. Changes in Puberty

22. Two Plates by Judy Chicago
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. External Female Anatomy
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