1. Reproductive System
Male

2. Anatomy - Male
Scrotum holding testis
Cremaster muscle

4. Male Gonad Testes Tunica albuginea 200-300 lobules
Seminiferous tubules – location of sperm production – ½ mile long per testis!!

7. Spermatogenesis Takes 5-10 weeks
Production can be 300 million sperm/day
Spermatogonia mature to become
Primary spermatocytes, which undergo Meiosis I to become
Secondary spermatocytes, which undergo Meiosis II to become
Spermatids

11. Sperm Spermatids mature to become
Spermatozoa (…oon is sing.) which can live for hrs, once ejaculated
Head
Nucleus
Acrosome
Midpiece
Mitochondria
Tail

13. Testes Straight tubules Rete testes Interstitial cells – Testosterone
Sperm production
Sex drive
Secondary sex characteristics

15. Puberty Physical signs Hormones Testosterone – Interstitial Cells
GnRH – Gonadotropin Releasing Hormone made by hypothalamus & stimulates Pituitary gland

17. Hormones
LH = ICSH – Interstitial Cell stimulating hormone, made by Pituitary gland and stimulates I.C. to make testosterone
FSH = Follicle Stimulating Hormone, made by Pituitary gland and stimulates spermatogenesis
Inhibin – made by testes and inhibits FSH

20. Epididymis Posterior to testes Head Body Tail
Place for maturation & storage of sperm
1 day-30 days

22. Ductus (Vas) deferens Location Transports sperm Spermatic cord
Inguinal canal

24. Urethra Location & function Prostatic Membranous Spongy = Penile
External urethral orifice

27. Accessory Sex Glands Seminal vesicles Prostate
Bulbourethral (Cowper’s) glands
Semen
Sperm + fluids
2.5-5 mls/ejac.; 300 million sperm/ejac.

30. Penis Erectile tissue – quite vascular Corpus cavernosum
Dorsolateral penis; most vast
Corpus spongiosum
Surrounding urethra

32. Penis
Glans penis
Prepuce

35. Sexual responses Erection Penis enlargement & rigidity
Vascular!! – dilation of arterioles
Mediated by Parasympathetic nerve impulses

36. Sexual responses Emission First portion of male orgasm
Mediated by sympathetic nerve impulses
Propels sperm to the urethra
Release of fluid from accessory sex glands

37. Sexual responses Ejaculation
Contractions resulting in release of SEMEN from urethra