Male Reproductive Flashcards
organs of the male reproductive system
prostate gland, seminal vesicle, penis, vas deferens, testes, scrotum, urethra
how is the sex of a baby determined?
by type of sperm that fertilizes the egg
X: female
Y: male
SRY gene
sex-determining region of Y-chromosome
fetus gonads begin to develop at ___ weeks
5 or 6
the genital tubercle becomes what structure?
glans penis
the urogenital folds become what structure?
erectile tissue
the labioscrotal folds become what structure?
scrotum
male gonads
testes
produces sperm
spermatogenic cells
produces testosterone
interstitial (Leydig)
what part of the sperm contains the enzymes that allow it to penetrate the egg?
acrosome
where is the ampulla and what structures does it connect?
vas deferens; joins the ducts of the seminal vesicle
where is the ejaculatory duct located?
between vas deferens and ducts of duct of seminal vesicle
the urethra is the passage for…
sperm and urine
sustentacular cells
aka nurse or Sertoli; regulates sperm production
BTB
blood-testis barrier
seminal vesicles function
secretes the viscous, nutrient-rich part of seminal fluid (60% of semen volume); contains fructose and prostaglandins
prostate gland function
adds watery, milky-looking secretion to seminal fluid (30% of semen volume); produces protein that promotes the sticking of sperm to the vaginal wall
bulbourethral gland function
secretes alkaline fluid (5% of semen volume); lubricates head of penis prior to insertion
muscles that supports scrotal pouch
Dartos and Cremaster
spermatic cord
fibrous cylinders located in inguinal canals
vasectomy cuts into what
vas deferens
erectile tissue
corpus spongiosum (houses urethra) corpora cavernosa
how much sperm is ejected during ejaculation and how many?
2-5 mL and 120 million sperm/mL
