1. Sexual Development  Genitals for both sexes develop from 3 identical structures  Genital tubercle: an anterior bud that becomes the glands or clitoris  Urogenital folds: tissue folds that lie lateral to the tubercle  Labioscrotal folds: larger pair of tissue that lie lateral to the urogenital folds

2. Sexual Development  Those 3 structures start to show sexual development around week 9 and by week 12 sex is distinctive  Since genitals develop from the same tissue the penis is homologous to the clitoris and the scrotum is homologous to the labia majoria  Testes develop by the kidneys and are pulled into the scrotum by the gubernaculum

3. Male Anatomy  Perineum: a diamond shaped region that contains the genitals and anus  Scrotum: a divided pouch that contains the testes  Median septum: marked by the perineal raphe, extends from the penis to the anus  Testes cannot produce sperm at body temp, the scrotum is about 2C cooler, testes are raised or lowered for best temp

4. Testes  Testes produce sperm  Tunica albuginea: is a white fibrous capsule, protection, fight infection  The testes are divided into wedge shaped lobules that contain seminiferous tubules where sperm is produced  The tubules lead into the rete testis where sperm partially mature

5. Sperm Ducts  Efferent ductules: carry sperm to the epididymis  Epididymis: sperm fully matures and are stored, sperm are fertile for 40-60 days then die and are reabsorbed  Vas Deferens: a long muscular tube that connects the testes to the ejaculatory duct  Ejaculatory duct: short tube where sperm, prostate fluid and vesicle fluid are mixed to become semen as it enters the urethra

6. Semen  Seminal vesicles: 60% of the semen neutralizes vaginal secretions, has fructose for energy and is sticky to ensure sperm sticks to vaginal walls so they don’t fall out  Prostate: 30% of semen activates sperm  Cowper's gland: produces clear fluid that coats glands for entry of vagina  Sperm: 10% of semen

7. Penis  The penis function is to deliver sperm to vagina, has three parts root, shaft, glands  Prepuce: layer of skin that covers the glands  Erectile tissue: tissue that fills with blood to erect the penis  Corpus sponginosum: single body that surrounds the urethra  Corpus cavernosa: twin bodies that are inferior to the sponginosum