Part 1 of "Science & Sexuality." You don't believe that "Adam and Eve" story, do you? Did Eve come from Adam? Or did Adam come from Eve? This is a physiologist's refutation of the biblical binary sexual system. Click on the next 9 slideshows in numerical order for the rest of this scientific update on human sexuality.

1. Science & Sexuality By Veronica Drantz, PhD © 2008 A refutation of the binary sexual system exemplified by the Adam & Eve story

2. Genesis Story Is BAD BIOLOGY and Causes Too Much Suffering! Muslim Adam & Eve

4. How Many Sexes Are There?

5. Human Chromosomes 23 Pairs XX (Female), XY (Male) Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

9. Barr Body in Typical Female Cells Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

10. Sexual Differentiation of Internal Genitalia Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

11. Sexual Differentiation of External Genitalia Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

12. Sexual Development in Mammals Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

13. Puberty Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

14. Male Testosterone Levels Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

15. Puberty Alteration in typical women Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005) Female Secondary Sex Characteristic Cause Genitalia Enlargement of breasts, uterus, vagina Estrogen Voice larynx retains prepubertal proportions; high-pitched voice Lack of testicular androgens Hair less body hair, more scalp hair, flat-topped pubic hair pattern Lack of testicular androgens Pubic and axillary hair Androgen Mental Interest in sex Androgen Body Conformation Narrow shoulders, broad hips, thighs that converge, arms that diverge (wide carrying angle), female distribution of fat in breasts & buttocks Lack of testicular androgens Skin Sebaceous glands more fluid (inhibit acne) Estrogen