inguinal structures Flashcards
inguinal canal is passageway for
external pudendal a. & v. genitofemoral n. lymphatics vaginal tunic (male) spermatic cord (male) vaginal process (female)
boundaries of the deep inguinal ring
medial boundary: lateral edge of the rectus abd. m.
cranial boundary: caudal edge of the internal abd. oblique n.
caudal boundary: inguinal ligament
internal abdominal oblique m. partly arises from what ligament
inguinal ligament
what ligament is relatively incomplete in the dog and cat
inguinal ligament
inguinal ligament separates ____ from ____
vascular lacuna from inguinal canal
branches of deep femoral a.
external pudendal a. and caudal epigastric a.
external iliac a. branches off of the aorta and turns into
femoral a. and deep femoral a.
what muscle does the genitofemoral n. give motor to?
cremaster m.
inside the abdomen, genitofemoral nerve courses with
external iliac a.
genitofemoral n. is sensory to skin in what region?
inguinal region and proximal medial thigh
efferent lymphatic vessels that pass through the inguinal canal are draining which lymph node?
inguinal lymph nodes
vaginal cavity in the male is located between
parietal vaginal tunic and visceral baginal tunic
vaginal ring in the entrance to the
vaginal cavity- spermatic cord passes through vaginal cavity
vaginal tunic is comprised of
internal spermatic fascia and parietal vaginal tunic
what structure is incised on an open castration?
vaginal tunic
spermatic cord forms at the
vaginal ring
components of the spermatic cord
testicular a., v., and n. pampiniform plexus testicular lymphatics ducts deferent deferent a. and v. (a. and v. of the ductus deferens) intermal cremaster muscle mesofuniculum
efferent vessels of the testicular lymphatics course to
medial iliac and lumbar aortic lnn.
scrotum position in dog vs. cat
dog- inguinal position
cat-perineal position
testis function
spermatozoa and hormone production
testis are covered by
tunica albuginea (dense white fibrous capsule) and visceral vaginal tunic (serous membrane)
epididymis function
storage and maturation of sperm, adheared to dorsolateral surface of testis
epididymis covered by
just visceral vaginal tunic
layers of scrotum and testes (outside to inside)
skin tunica dartos external spermatic fascia internal spermatic fascia parietal vaginal tunic vaginal cavity visceral. vaginal tunic tunica albuginea testicular parenchyma
gubernaculum m.
muscle contracts and pulls testis down through inguinal canal
remnants of the gubernaculum m. in adult male is called
proper ligament of the testis (courses between tail of epididymis and testis)
revenants of the gubernaculum m. in adult female is called
round ligament of the uterus
descent of testis
vaginal ring -> deep inguinal ring -> inguinal canal -> superficial inguinal ring
vaginal ring is just dorsal to
deep inguinal ring, anything that goes through one will go through the other (except for external pudendal a., v., and genitofemoral n. only pass through dorsal inguinal ring, not vaginal ring)
to find deep vaginal
use triangle of borders
2 types of hernia
scrotal hernia
inguinal hernia
intestinal segment in vaginal ring and eventually moving down to scrotum causing swelling in scrotum
scrotal hernia
intestinal segment ends up not going through vaginal ring and just deep inguinal ring, swelling in inguinal region
inguinal hernia