human reproduction

testes

produce sperm and testosterone

testosterone

promotes the development of secondary sex characteristics, accessory organs and muscle growth

scrotum

sac of skin containing testes-outside of the body

seminiferous tubules

300 to 600 coiled tubes where immature sperm are formed

epididymis

upper rear region in the testes that stores sperm until they’re mature (18 hours)

spermatogonia

primary sex cell

miotic division

produces more spermatogonia, divides throughout life

meiotic division

produces sperm cells, begins at puberty and ends at death

ductus vas deferens

tube that leads from the epididymis to the urethra in the penis

ejaculatory duct

tube that joins the ductus vas deferens, seminal duct and urethra

urethra

passage in penis that carries sperm or urine

semen

mixture of sperm and fluids from the seminal glands

seminal vesicles

two pouches glands found where the vas deferens meets the ejaculatory duct, produces seminal fluid

prostate gland

doughnut shaped structure that is divided by the urethra

corpora cavernosum

a pair erectile tissue masses surrounds the deep artery

corpora spongiosum

smaller single erectile tissue mass surrounding the urethra

glans penis

enlarged distal end of the penis

prepuce

foreskin, loose skin covering the glans penis

external urethral orifice

terminal slit-like opening of urethra

erection

blood build up in the erectile tissue causing swelling and elongation of the penis

emission

the mixing of sperm and seminal fluid forming semen in the urethera

ejaculation

muscular contractions causing and increase in pressure, forcing semen out of the penis

ovaries

produces eggs (ovum), estrogen and progesterone

estrogen

initiates the development of a females secondary sex characteristics

progestogen

keep the uterine lining thick and stimulate the menstral cycle

follicles

sac that contains eggs

oogenesis

formation of egg in the ovaries

oogonia

primary sex cell

meiosis

unequal division of the oocyte to form an ovum

ovulation

the break off of a mature egg from it’s follicle leaving the ovary

oviducts

4 in tube leading from each ovary to the uterus

fimbriae

fringe like projections at the oviduct opening

uterus

thick, pear shaped organ

endometrium

thin inner mucosal layer

myometrium

thick middle muscle layer

perimetrium

outer serosal layer

cervix

narrow wall leading from the vagina into the uterus

vagina

tube made of smooth muscle lined with mucous membrane, is the receptacle for the penis during sex

mon pubis

skin covered pad of fat covering pubic symphysis

labia

two layers of fatty tissue and gland

vestibule

area around labia minora

clitoris

composed of erectile tissue

vaginal orifice

opening to vagina