Male Anatomy Vocab Flashcards
__cells produce testosterone
Leydig cells of the testes
testosterone only acts when its converted to ___ by ___ enzyme
converted to 5a DHT by 5a reductase
__ muscle contracts scrotum to wrinkle it. When relaxed scrotum is mooth
dartos muscle
__ muscle controls position of scrotum and testes
cremaster muscle
testes are covered by __
tnica albuginea acts like the cortex of the testes
there are about __ lobules per teste
250
each lobule has ___
about 1-4 seminiferous tubules that converge to form a single straight tubule, which leads into rete testis
rete testis is__
short efferent duct that exits the testes to the epididymis
__ is where sperm complete their maturity
epididymis
what happens to spermatogonium in a seminiferous tubule?
spermatogonium - primary spermatocyte - secondary spermatocyte - spermatid - sperm - into the seminiferous tubule
ductus deferens aka
vas deferens
how does vas deferens travel?
continuous with epididymis
enters abdominopelvic cavity through the inguinal canal and passes along the lateral pelvic wall behind bladder and toward the prostate gland
what are the 3 regions of the urethra in male?
prostatic urethra, membranous urethra, and penile urethra
2 other names for penile urethra?
cavernous urethra or spongy urethra
3 types of accessory glands in males
seminal vesicles, prostate gland, and bulbourethral glands
create fluids that enter the urethra
when sperm count is under ____ get fertility problems
less than 10-20 million per mL
3 columns of penis etc..
2 dorsal columns = corpora cavernosa
1 ventral column = corpus spongiosum
root of the penis attaches to __
the pubic arch
erection leads to increase in what 3 things
penus length, wideness and firmness
for males FSH does what?
from the ant. pit. and stimulates spermatogenesis
for males LH does what?
stimulates the production of testosterone
what is another name for LH
ICSH: interstitial cell stimulating hormone
spermatogonia and primary spermatocytes have ___
46 chromosomes XY because made by mitosis
after ___ sperm are finally mature
2 rounds of meiosis now a haploid
acrosome
contains enzyme to help sperm penetrate egg
midpiece of sperm has..
mitochondria for ATP production
tail portion
flagellum for sperm locomotion
sperm can live __ hrs within female body
48 hours
from primary spermatocyte to maturity takes ___
74 days
after vasectomy male is infertile after __ days
30 days
