Male Anatomy Flashcards
what forms the internal urethral sphincter at the neck of the male bladder?
detrusor muscle
role of the internal urethral sphincter
contracts during ejaculation to prevent retrograde movement
three parts of the male urethra
prostatic urethra
membranous
spongy urethra
where do the testes develop embryologically?
posterior abdominal wall
how do the testes reach their final position?
descend through anterior abdominal wall via the inguinal canal
where do the testis sit?
scrotum in the tunica vaginalis
where is sperm produced?
seminiferous tubules
what is special about the seminiferous tubules/ sperm production?
temperature is about 1 degree colder than the rest of the body controlled by the dartos muscle
sperm passage
seminiferous tubules > rete testis > head of epididymis > vas deferens > seminal gland > ejaculatory duct > prostate gland > urethra
normal testicular volume and length
12-25ml
5cm
risk for the spermatic cord?
quite mobile within the scrotum so risks torsion
blood supply to the testis
arteries from lateral aspect of abdominal aorta
veins: left testicular vein to left renal and right testicular to IVC
what does the spermatic cord hold?
vas deferens
artery
vein
male sterilisation
vas deferens is transected and lumen sutured closed bilaterally
what can retraction of the prepuce cause?
constriction of neck of the glans causing it to swell (paraphimosis)
