28 B (Male Reproductive System) Flashcards
what does the scrotum do?
provides the testes with a cooler environment than body temperature
skin-covered sac
scrotum
the scrotum is homologous to what female structure?
the labia majora
this structure consists of muscle, vasculature & nervous tissue
spermatic cord
where does the spermatic cord originate?
in the inguinal canal
each testes is
an oval organ within the scrotum
what does the testes produce?
sperm & testosterone
each testes is subdivided into
about 250 lobules
each lobule of the testes contains up to
4 convoluted seminiferous tubules
development of sperm
spermatogenesis
where does spermatogenesis occur?
in the seminiferous tubules of testes
what structures make up sperm?
(1) head
(2) acrosome
(3) mitochondria
(4) flagellum
list the ducts in the male reproductive tract, from the testis through the penis
(1) epididymis
(2) ductus deferens
(3) ejaculatory duct
(4) urethra
this duct is situated on the posterosuperior surface of the testes
epididymis
what is the function of the epididmyis?
stores sperm cells & assists in their maturation
sperm leaving the epididymis will enter what ducts?
the thick-walled ductus deferens
the ductus deferens travels within the ______
spermatic cord
the ductus deferens will enter the pelvic cavity through the ______
inguinal canal
how is the ejaculatory duct formed?
the ductus deferens unites with the proximal portion of the seminal vesicle
what is the function of the ejaculatory duct?
conducts sperm & seminal vesicle secretions to the prostatic urethra
what is the function of the male urethra?
transports semen from both ejaculatory ducts to the outside of the body
list the subregions of the male urethra
(1) prostatic
(2) membranous
(3) spongy
3 glands secrete fluids to mix with sperm to create what?
seminal fluid
what is the purpose of seminal fluid?
nourishment of the sperm & neutralizes the acidity of the vagina
list the three accessory glands associated with the male reproductive system
(1) seminal vesicles
(2) prostate gland
(3) bulbourethral glands
this gland is an elongated hollow organ
seminal vesicles
where are the seminal vesicles located?
on the posterior surface of the urinary bladder, lateral to the ampulla of the ductus deferens
what is the function of the seminal vesicles
they secrete a viscous, whitish-yellow, alkaline fluid containing fructose & prostaglandins
this gland secretes directly into the prostatic urethra
prostate gland
where is the prostate gland located?
immediately inferior to the urinary bladder
when released, semen is called
ejaculate
what is semen made up of?
seminal fluid & sperm
what does external genitalia formed from?
penis & scrotum
elongated portion of the penis
body/shaft
tip of the penis
glans
what does the glans surround?
the external urethral orifice
the foreskin of an uncircumcised penis
prepuce
what does the shaft of the penis contain?
3 parallel cylindrical erectile bodies
list the erectile bodies of the shaft
(1) paired corpora cavernosa
(2) single corpus spongiosum
this body is ventral & along the midline
corpus spongiosum
these bodies are located dorsolaterally
corpora cavernosa
what part of the corpus spongiosum continues within the glans?
the distal end
what does the corpus spongiosum surround?
the spongy urethra
what is the function of the bulbourethral gland?
secretes mucin for lubrication
this condition is the result of the growth of the prostate constricting the urethra
benign prostatic hyperplastic (BPH)
what can happen as a result of BPH?
urine flow is affected
this condition is the result of soft tissue bulging through the opening of the inguinal canal
inguinal hernia
what is the function of the body of the penis?
contains erectile tissue that simulates sexual arousal & climax
what is the function of the glans of the penis?
contains erectile tissue that simulates sexual arousal & climax
