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A&P - Ch 27

Reproductive System

organ system that functions to produce offspring reproductive system
primary reproductive organ; i.e., the testis of the male or the ovary of the female gonads
sex or germ cell gamete
ducts, gland, & external genitalia are referred to as accessory reproductive organs
sac of skin & superficial fascia that hangs outside abdominopelvic cavity scrotum
male primary reproductive organ that produces sperm; male gonad testes
testosterone, estrogens, & progesterone sex hormones
highly convoluted tubes within the testes; form sperm seminiferous tubules
cells located in loose CT surrounding seminiferous tubules; produce androgens (most importantly testosterone), which are secreted into surrounding interstitial fluid interstitial cells
epididymis, ductus deferens, ejaculatory duct, and the urethra system of ducts that delivery sperm to exterior
seminal vesicles, prostate, & bulbourethral glands accessory glands that empty secretions into ducts during ejaculation
scrotum contains paired testes
external positioning of scrotum keeps testes 3degrees C __ than core body temp lower
temp of scrotum needed for sperm production
failure of the testis to make their normal descent cryptorchidism
encloses nerve fibers, blood vessels, & contains ductus deferens spermatic cord
produce sperm; seminiferous tubules
surrounding seminiferous tubules are interstitial cells that produce androgens
consists of an attached root, & shaft that ends in glans penis penis
internally the penis contains urethra & 3 cylindrical bodies of erectile tissue
either of two masses of erectile tissue corpora cavernosa
mass of tissue that, with the corpora cavernosa, forms the erectile tissue of the penis corpus spongiosum
corpus spongiosum ventrally surrounds urethra
portion of male duct system in which sperm mature; empties into ductus (or vas) deferens; has a head, body & tail epididymis
upon ejaculation, epididymis __, __ sperm into the ductus deferens contracts; expelling
runs in spermatic cord through inguinal canal into pelvic cavity ductus deferens (vas deferens)
at back of bladder, ductus deferens expands & joins duct of seminal vesicle to form ejaculatory duct
each ejaculatory duct enter prostatic urethra
portion surrounded by prostate prostatic urethra
intermediate part membranous urethra
runs through penis & opens to outside at external orifice spongy (penile) urethra
secrete 60% of the volume of semen; join ductus deferens to form ejaculatory duct; sperm & seminal fluid mix in ejaculatory duct & enter prostatic urethra during ejaculation seminal vesicles
encircles prostatic urethra inferior to bladder; its secretions account for 1/3 of semen volume; enter prostatic urethra during ejaculation prostate gland
pea-sized glands inferior to the prostate; produce thick clear mucus prior to ejaculation that neutralizes traces of acidic urine in urethra bulbourethral glands
provides a transport medium & nutrients (fructose) for sperms; contains prostaglandins, antibiotics; contains 50-130 million sperm/ml semen
Created by: lfrancois