1. © 2015 Pearson Education, Inc.

2. Gonads Structure: primary sex organs Function: Endocrine and Exocrine
Testes : males
Ovaries : females
Function: Endocrine and Exocrine
Secrete hormones
produce gametes (sex cells)
Sperm—male gametes
Ova (eggs)—female gametes
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3. The Male Reproductive System: Testes and Accessory Structures
Pages

4. Male Reproductive Anatomy Exocrine Function
Testes structure from inside out and path of sperm:
Seminiferous tubules (produce the sperm)
Rete testis (gateway to epididymis)
Epididymis (duct)
Vas deferens (duct)
Spermatic cord- (here the vas deferens runs alongside the blood and nerve supply to arrive at the prostate)
Ejaculatory duct- moves sperm through prostate to urethra
This is a series of tubes and ducts through which sperm is created and transported for exit by way of the urethra
This action is driven by peristaltic waves
© 2015 Pearson Education, Inc.

5. Figure 16.1 Sagittal section of the testis and associated epididymis.
Spermatic cord
Blood vessels and nerves
Seminiferous tubule
Rete testis
Ductus (vas) deferens
Lobule
Septum
Tunica albuginea
Epididymis

6. Male Reproductive Anatomy: Endocrine Function
Interstitial cells (epithelial) surround the seminiferous tubules
These cells produce androgens (group of sex hormones)
Testosterone:
promotes growth/development of reproductive structures
Promotes development of secondary sex characteristics

7. Accessory Reproductive Structures
Seminal glands (vesicles): makes 60% of semen
high in fructose, vitamins, prostaglandins, which nourish and activate sperm
Located at the base of the bladder
Contains a yellow pigment that makes semen flouresce by UV light and therefore can be used in sexual assault investigations
© 2015 Pearson Education, Inc.

8. Accessory Reproductive Structures
Prostate: makes 40% of semen
Produces milky fluid to activate sperm
Enhances sperm motility
Bulbo-urethral glands:
Lie just under prostate
Produce mucus that clears the urethra of urine prior to ejaculation

9. Figure 16.2a Male reproductive organs.
Ureter
Urinary bladder
Seminal vesicle
Prostatic urethra
Ejaculatory duct
Prostate
Bulbo-urethral gland
Ductus (vas) deferens
Epididymis
Glans penis
Testis
Prepuce
Scrotum

10. External Genitalia Penis Scrotum
delivers sperm into the female reproductive tract
arrangement of dense connective tissue sheaths, spongy partitions (caverns), and muscular tissues that provide:
Erection: controlled by the parasympathetic n.s.
Ejaculation: controlled by the sympathetic n.s.
Scrotum
sac of skin outside the abdomen that houses the testes
maintains testes at body temperature to protect sperm
© 2015 Pearson Education, Inc.

11. Figure 16.2b Male reproductive organs.
Urinary bladder
Ureter
Ampulla of ductus deferens
Prostate
Seminal vesicle
Ejaculatory duct
Bulbo-urethral gland
Membranous urethra
Ductus (vas) deferens
Root of penis
Erectile tissue of penis
Epididymis
Shaft (body) of penis
Testis
Spongy urethra
Glans penis
Prepuce
(b)
External urethral orifice

12. Figure 16.2a Male reproductive organs.
Urinary bladder
urethra
Urogenital diaphragm
Erectile tissue of the penis
Bulbo-urethral gland
Spongy urethra
Shaft of the penis
Ductus (vas) deferens
External urethral orifice