Male Reproductive System - Internal genitalia - Ducts & Testes

Sperm & testosterone producing organs:

Testes

What are the ducts that move sperm from the testes out of the penis?

Epididymis, Vas (ductus), defense, Ejaculatory duct, & Urethra

What are the general structures of exocrine glands that secrete fluids into the ducts, adding the fluid components to the sperm to make semen?

Seminal vesicles, prostate gland, and Bulbourethral gland.

What are the testes responsible for?

the production of testosterone and sperm

Testosterone

Steroid Hormone

Sperm

gamete - specialized sex cell

Each testis is organized into hundreds of sperm producing…..

Seminiferous Tubules

Tubules are made of a specialized simple columnar epithelium called…

sertoli cells

What occurs between Sertoli cells from the basal surface of the seminiferous tubule to the lumen?

Spermatogenesis

What cells found between adjacent seminiferous tubules synthesize testosterone?

Interstital (Leydig) Cells

Epididymis

a mass of coiled tubes that the sperm that the sperm must pass through prior to ejaculation.

Where does the sperm become mature?

as it passes through the tubes towards the vas deferens

What happens with Epididymis during ejaculation?

a layer of smooth muscle that surrounds the distal epididymis contracts, expelling sperm into the vas deferens

Vas deferens

a duct that propels ejaculated sperm from the epididymis into the urethra

Vas Deferens distal end merges with duct ___ to give rise ____.

Seminal gland; ejaculatory duct

Vasectomy

an effective form of birth control (99%) whereby the vas deferens is cut and tied.

What does vasectomy does not protect against?

sexually transmitted infections (STIs)