Pelvic Cavity Flashcards
Describe the pelvic cavity.
caudal extension of abdominal cavity
pelvic inlet -> pelvic outlet
List the boundaries of the pelvic cavity.
pelvic girdle
sacrum & caudal vertebrae
gluteal/thigh/tail musculature
sacrotuberous ligament
Describe the location of the sacrotuberous ligament.
From transverse processes of last sacral and first caudal vertebra to the ischiatic tuberosity
Describe the boundaries of the pelvic inlet.
d - base of sacrum
l - wing/body of ilium
v - pubis
Describe the boundaries of the pelvic outlet.
d - caudal vertebrae
l - sacrotuberous ligament, gluteal muscles (superficial), pelvic diaphragm muscles
v - ischiatica arch
Describe the pelvic canal.
between inlet & outlet
long dorsal, short ventral
lat wall = ilium/ischium/pubis
List the peritoneum of the pelvic cavity
visceral
parietal
peritoneal
List the gross contents of the pelvic cavity.
intestinal tract
urinary tract
reproductive tract
List the main arteries of the pelvic canal.
caudal mesenteric
deep circumflex iliac
paired iliac (internal & external)
What does the caudal mesenteric artery supply?
colon
rectum
What does the deep circumflex iliac artery supply?
caudodorsal abdominal wall
What does the internal iliac artery supply?
pelvic viscera
genitalia
becomes internal pudendal artery
What does the external iliac artery supply?
pelvic limbs
becomes femoral artery
What is the main nerve supply of the pelvic cavity?
pudenal nerve
sensory & motor
S1-S3 combined
Describe the branches of the pudenal nerve & what they innervate.
caudal rectal nerve - external anal sphincter
perineal nerves - anus/perineum/scrotum
dorsal nerve of penis
List the parasympathetic and sympathetic nerve fibres.
para:
S1-3 - pelvic nerve - pelvic plexus - viscera
sympa:
caudal mesenteric ganglion - hypogastric nerve - pelvic plexus - viscera
Describe the components of the pelvic diaphragm.
coccygeus muscle
levator ani muscle
parturition/defication/wagging
Describe the coccygeus muscle.
o - ischiatic spine i - lateral tail innervation - caudal rectal nerve bilat action - tail between legs unilat action - wag
Describe the levator ani muscle.
o - medial ilium/dorsal pubis/pelvic symphysis
i - external anal sphincter
innervation - caudal rectal nerve
bilat action - tail against anus/sharp angulation
unilat action - wag
Define the perineum.
part of body surrounding end of digestive/urinary tract
What are perianal/circumanal glands?
sebaceous glands in epidermis in perineal region
NOT ANAL GLANDS
Draw & label a schematic of the arterial supply for the pelvic cavity.
add photo
