Male Reproductive Anatomy Flashcards
what is anatomical position in male anatomy
an erect penis tipped up to umbilicus, so underside of penis is ventral, and top side is dorsal
what is the penile raphe
line along ventral side of penis
what is the scrotal raphe
line along ventral side of scrotum
what is the perineal raphe
line between scrotum and anus
what structures are in the superficial space
- ischiocavernosus
- bulbospongiosus
- superficial transverse perineal muscle
- bulb of penis
- crus of penis
innervation of the superficial space
pudendal nerve (S2-S4)
what anchors/roots of external genitalia?
perineal membrane
what makes up the shaft/body of the penis?
the crura and bulb of the penis
what is the crura of the penis
2 lines of corpora cavernosa
what is the bulb of the penis
- corpus spongiosum
- glans penis
- spongy urethra
portions of male urethra
- pre-prostatic
- prostatic
- membranous
- spongy/penile
what does the pre-prostatic region of the urethra contain
internal urethral sphincter
function of internal urethral sphincter in the urethra
prevents retrograde flow of semen into bladder during ejaculation
location of membranous urethra
deep space of UG diaphragm
what does the membranous urethra contain
external urethral sphincter
characteristic of the membranous urethra
narrowest part, goes through deep space and has external urethral sphincter
what does the spongy urethra pass through?
superficial space and down the corpus spongiosum
what is the pubovesical ligament
ligament that contains smooth muscle fibers, is continuous with the detrusor muscle and holds open vesical neck around the urethra
what is the puboprostatic ligament
is a condensation of the superior fascia of the pelvic diaphragm with smooth muscle and connective tissue
function and location of puboprostatic ligament
lateral to pubovesical ligament, functions for urethral support and urinary continence
4 lobes of prostate gland
- anterior
- medial
- lateral
- posterior
what lobe of prostate gland is palpable upon rectal exam
posterior lobe
what lobe of prostate is the first affected with prostate cancer
posterior lobe
what is the male homologue of the uterus and vagina?
prostatic utricle (pouch)
what is the postatic utricle a remnant of?
paramesonephric duct
what is the seminal colliculus
median elevation in the prostatic urethra
what is the prostatic sinus
channels on either side of the seminal colliculus, prostate ejects prostatic fluid via prostatic ducts and ejaculatory ducts
trace flow of semen through duct system
- made in seminiferous tubules
- travel through the straight tubules
- through the rete testis of mediastinum testis
- through efferent ductules
- head of epididymis
- body of epididymis
- tail of epididymis
- ductus deferens (vas deferens)
- ejaculatory ducts
- urethra
- penis
which are the accessory glands of the ejaculatory system
- prostate gland
- bulbourethral glands (cowpers)
- seminal vesicles
what does the prostate gland secrete
acidic prostatic fluid
what does the bulbourethral gland secrete
alkaline mucus to lubricate the urethra and increase ejaculatory velocity
where are the cowper’s glands?
deep space at UG diaphgragm
what do the seminal vesicles secrete
fructose rich seminal fluid
what is the main component of semen
seminal fluid makes up 60% of semen
which are the accessory glands of the ejaculatory system
- prostate gland
- bulbourethral glands (cowpers)
- seminal vesicles
what does the prostate gland secrete
acidic prostatic fluid
what does the bulbourethral gland secrete
alkaline mucus to lubricate the urethra and increase ejaculatory velocity
where are the cowper’s glands?
deep space at UG diaphgragm
what do the seminal vesicles secrete
fructose rich seminal fluid
what is the main component of semen
seminal fluid makes up 60% of semen
