Blackcloud Body Wall and Thorax p.65-78 Flashcards
only structures that are ____ are dependable in location
retroperitoneal
the pancreas is secondarily retroperitoneal except ____, which is intraperitoneal, within the splenorenal ligament
the tail
stomach, liver, pancreas, duodenum proximal to bile duct
foregut derivatives
distal duodenum, jejunum, ileum, cecum, appendix, ascending and tranverse (proximal 2/3) colon
midgut derivatives
midgut derivatives are supplied by
SMA (origin L1)
tranverse colon (distal 1/3), descending and sigmoid colon, rectum, superior canal, epithelium of bladder and urethra
hindgut derivatives
hindgut derivatives supplied by
IMA (origin L3)
an ileal diverticulum (yolk sac persistence) in 2% of population in antimesenteric border of iluem
Meckel’s diverticulum
a primarily retroperitoneal structure is ____ to a secondarily retroperitoneal structure
always posterior
primarily retroperitoneal organs drain
directly into IVC
formed by end-to-end anastomoses of ileocolic, right colic, mid colic, left colic, and sigmoidal arteries
marginal artery
closely related to pigmented skin of scrotum
dartos fascia
responsible for rugose appearance of scrotum
Fat-free fascia layer including dartos muscle
posterior scrotal branches of perineal, anterior scrotal branches of deep external pudendal
supply to scrotum
perineal artery is branch of
internal pudendal
deep external pudenal artery is branch of
femoral
cremasteric artery is branch of
inferior epigastric
drains scrotum
scrotal veins
lymphatics in scrotum
superficial inguinal lymph nodes
genital branches, anterior and posterior scrotal nerves, perineal branches
innervation to scrotum
anterior scrotal nerves are branches of
Ilio-inguinal nerve (L1)
posterior scrotal nerves are branches of
perineal (from pudendal, S2-S4)
genital nerve branch is branch of
genitofemoral nerve (L1, L2)
perineal nerve branch is branch of
posterior cutaneous nerve of thigh (S2-S3)
internal spermatic fascia origin
transversalis fascia
cremasteric fascia origin
internal oblique fascia
cremaster muscle origin
internal oblique muscle
external spermatic fascia origin
external oblique fascia
formed within testes, stored in epididymis, external to abdomen
sperm
runs through inguinal canal to enter abdominal and pelvic cavities
ductus deferens
where sperm enter the urethra
prostate gland
the surface of the testis is smooth because
covered by visceral layer of tunica vaginalis
epididymis consists of head, body and tail, all continuous with
ductus deferens
inguinal canal contents in males
spermatic cord
inguinal canal contents in females
round ligament
apo of external obliques, fibers from internal obliques
anterior wall of inguinal canal
transversalis fascia, conjoined tendon from internal oblique and transversus abdominis apo
posterior wall of inguinal canal
inguinal ligament and lacunar ligament (attaches inguinal ligament to pectineaus muscle)
floor of inguinal canal
arching fibers from internal oblique and transversus muscles
roof of inguinal canal
internal entrance to inguinal canal, evagination of transversalis fascia
deep (internal) ring
exit from inguinal canal, slit-like opening between diagonal fibers of aponeurosis of external oblique
superficial (external) ring
inguinal canal, femoral ring, umbilicus and linea alba
regions prone to hernias
most common hernias
Inguinal (14% of men, 2% of women)
hernias exclusive to women
femoral and umbilical
necrosis of bowel and fecal obstruction
if bowel is trapped in hernia sac
section of bowel enters spermatic cord, passes through inguinal canal, and can enter scrotum
indirect hernia