CH 9 Definitions Flashcards
glans penis
sensitive tip of the penis; comparable to the clitoris in the female
identical twins
two infants resulting from division of one fertilized egg. conjoined or siamese twins are incompletely separated identical twins.
infertility
in a man, any problem that lowers the chances of his female partner getting pregnant
interstitial cells of the testes
specialized cells that lie adjacent to the seminiferous tubules in the testes. these cells produce testosterone and are also called leydig cells.
parenchymal tissue
essential distinctive cells of an organ. in the testis, the seminiferous tubules that produce sperm are parenchymal.
penis
male external organ of reproduction
perineum
external region between the anus and the scrotum in the male.
prepuce
foreskin; fold of skin covering the tip of the penis
prostate gland
exocrine gland at the base of the male urinary bladder. the prostate secretes fluid that contributes to semen during ejaculation. *don’t confuse prostate, the male gland, with prostrate, which means lying down
scrotum
external sac that contains the testes
semen
spermatozoa (sperm cells) and seminal fluid
(prostatic and seminal vesicle secretions), discharged from the urethra during ejaculation
seminal vesicles
paired sac-like exocrine glands that secrete fluid (a major component of semen) into the vas deferens
seminiferous tubules
narrow, coiled tubules that produce sperm in the testes
spermatozoon
sperm cell
spermatozoa
sperm cell, plural
sterilization
procedure that removes a person’s ability to produce or release reproductive cells; removal of testicles, vasectomy, and oophorectomy are sterilization procedures
stromal tissue
supportive, connective tissue of an organ, as distinguished from its parenchyma. also called stroma.
testis
male gonad (testicle) that produces spermatozoa and testosterone remember: testis means one testicle, and testes is two testicles
testes
plural for testicle, meaning two
testosterone
hormone secreted by the interstitial tissue of the testes; responsible for male sex characteristics
vas deferens
narrow tube (one on each side) carrying sperm from the epididymis toward the urethra. also called ductal deferens.
perineum (area between anus and scrotum) is not the same as peritoneum, which is:
the membrane surrounding the abdominal cavity
semen is the thick, whitish secretion discharged from the urethra during ejaculation while sperm:
sperm/ spermatazoa are cells that develop in the testes- semen contains sperm.
sterilization can be performed in men and women, while impotence:
only happens in men, as it is the inability of a male to sustain an erection or achieve ejaculation
bulborethral glands
pair of exocrine glands near the male urethra, they secrete fluid into the urethra. also called cowper glands.
circumcision
removal of the prepuce (foreskin). it is a common elective procedure performed shortly after birth.
ejaculation
ejection of sperm and fluid from the male urethra.
ejaculatory duct
tube through which semen enters the male urethra
epididymis
one of a pair of long tightly coiled tubes above each testis that stores and carries sperm from seminiferous tubules to the vas deferens.
epididymides
referring to both epididymus on each side
erectile dysfunction
inability of an adult male to achieve an erection; impotence
flagellum
hair-like projection on a sperm cell that makes it motile (able to move).
foreskin
fold of skin covering the head of the penis; prepuce
fraternal twins
two infants resulting from fertilization of two separate ova by two separate sperm cells (two amniotic sacs)
