human reproduction

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43 Terms

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testes

produce sperm and testosterone

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testosterone

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

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scrotum

sac of skin containing testes-outside of the body

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seminiferous tubules

300 to 600 coiled tubes where immature sperm are formed

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epididymis

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

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spermatogonia

primary sex cell

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miotic division

produces more spermatogonia, divides throughout life

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meiotic division

produces sperm cells, begins at puberty and ends at death

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ductus vas deferens

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

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ejaculatory duct

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

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urethra

passage in penis that carries sperm or urine

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semen

mixture of sperm and fluids from the seminal glands

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seminal vesicles

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

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prostate gland

doughnut shaped structure that is divided by the urethra

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corpora cavernosum

a pair erectile tissue masses surrounds the deep artery

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corpora spongiosum

smaller single erectile tissue mass surrounding the urethra

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glans penis

enlarged distal end of the penis

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prepuce

foreskin, loose skin covering the glans penis

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external urethral orifice

terminal slit-like opening of urethra

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erection

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

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emission

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

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ejaculation

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

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ovaries

produces eggs (ovum), estrogen and progesterone

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estrogen

initiates the development of a females secondary sex characteristics

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progestogen

keep the uterine lining thick and stimulate the menstral cycle

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follicles

sac that contains eggs

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oogenesis

formation of egg in the ovaries

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oogonia

primary sex cell

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meiosis

unequal division of the oocyte to form an ovum

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ovulation

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

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oviducts

4 in tube leading from each ovary to the uterus

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fimbriae

fringe like projections at the oviduct opening

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uterus

thick, pear shaped organ

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endometrium

thin inner mucosal layer

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myometrium

thick middle muscle layer

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perimetrium

outer serosal layer

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cervix

narrow wall leading from the vagina into the uterus

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vagina

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

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mon pubis

skin covered pad of fat covering pubic symphysis

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labia

two layers of fatty tissue and gland

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vestibule

area around labia minora

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clitoris

composed of erectile tissue

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vaginal orifice

opening to vagina