ANATOMY 2 Flashcards
where is internal urethral orifice (male)
between bladder and urethra
when does internal urethral orifice contract
during ejaculation to prevent retrograde ejaculation
internal urethral sphincter is volantar/involuntary
involuntary
external urethral sphincter is voluntary/involuntary
voluntary
where is prostate situated
immediately inferior to bladder
what is urethra called when in prostate
prostatic urethra
what is below prostate
levator ani
what is urethra called when in corpus spongiosum
spongy urethra
what pouch is in male pelvis
rectovesicle pouch
where do testes originate
posterior wall of abdominal cavity
where are testes situated when born
scrotum
what do testes pass through in their descent to scrotum
anterior abdominal wall and inguinal canal
what structures are contained in spermatic cord
testicular artery pampiniform plexus (spermatic vein) vas deferens lymphatics nerves
what is the conjoint tendon
medial end of combined aponeurses of internal oblique and transversus abdominis muscles
what does conjoint tendon do
anchors the muscles inferiorly to pubic bone
what fascia covers spermatic cord
internal spermatic fascia
cremasteric fascia
external spermatic fascia
what covers testes in scrotum
tunica vaginalis
condition of too much fluid in tunica vaginalis
hydrocele
where is sperm produced
seminiferous tubules
what muscle in scrotum keeps testes at optimum temperature for spermatogenesis (1 degree below normal)
dartos muscle
normal length and volume of testes
5cm length
12-25ml volume
where does sperm go after seminiferous tubules
rete testes (posterior)
route of sperm from rete testes
head then tail of epididymis
vas deferens (up spermatic cord)
through deep inguinal ring and inguinal canal
become right and left ejaculatory ducts after seminal glands
combine to make prostatic urethra
spongy urethra
arterial supply to testes
lateral branches of abdominal aorta
where does left testicular vein drain to
left renal vein
where does right testicular vein drain to
IVC
where are seminal glands
posterior surface of bladder, above prostate
what do seminal glands secrete
fructose (energise sperm)
where are bulbourethral glands and what do they do
below prostate
secrete mucus to lubricate urethra and neutralise acidity
what happens in a vasectomy
vas deferens is transected in scrotum
what is anatomical position of penis
erect
head of penis is called what
glans penis
what is swelling of glans penis and what can is be due to
paraphimosis
due to retraction of prepuce constricting neck of glans
what is ridge running from anus to glans penis
raphe (scrotal and penile)
what is root of penis attached to
ischium
what are the 3 cylinders of erectile tissue in penis
corpus cavernosum (right and left) - posterior corpus spongiosum - anterior
what do the corpus cavernosums contain
deep arteries of penis
where is superficial perineal pouch
below perineal membrane
what makes up root of penis
bulb (corpus spongiosum, crura, cavernosum)
what muscles are associated with superficial perineal pouch (male)
bulbospongiusus (along penis)
ischiocaernosus (from ischium, jouns to bulbospongiousus)
superficial transverse perineal muscle (from inferior ischium, joins to anal sphincter)
arterial supply to penis
deep arteries of penis
from internal pudendal
from internal iliav
arterial supply to scrotum
internal pudendal artery and branches of external iliac
where does lymph from scrotum and most of penis drain
superficial inguinal nodes
where does lymph from testes drain
lumbar/para-aortic nodes
