Pelvic Cavity

Question 1

Describe the pelvic cavity.

Answer 1

caudal extension of abdominal cavity

pelvic inlet -> pelvic outlet

Question 2

List the boundaries of the pelvic cavity.

Answer 2

pelvic girdle
sacrum & caudal vertebrae
gluteal/thigh/tail musculature
sacrotuberous ligament

Question 3

Describe the location of the sacrotuberous ligament.

Answer 3

From transverse processes of last sacral and first caudal vertebra to the ischiatic tuberosity

Question 4

Describe the boundaries of the pelvic inlet.

Answer 4

d - base of sacrum
l - wing/body of ilium
v - pubis

Question 5

Describe the boundaries of the pelvic outlet.

Answer 5

d - caudal vertebrae
l - sacrotuberous ligament, gluteal muscles (superficial), pelvic diaphragm muscles
v - ischiatica arch

Question 6

Describe the pelvic canal.

Answer 6

between inlet & outlet
long dorsal, short ventral
lat wall = ilium/ischium/pubis

Question 7

List the peritoneum of the pelvic cavity

Answer 7

visceral
parietal
peritoneal

Question 8

List the gross contents of the pelvic cavity.

Answer 8

intestinal tract
urinary tract
reproductive tract

Question 9

List the main arteries of the pelvic canal.

Answer 9

caudal mesenteric
deep circumflex iliac
paired iliac (internal & external)

Question 10

What does the caudal mesenteric artery supply?

Answer 10

colon

rectum

Question 11

What does the deep circumflex iliac artery supply?

Answer 11

caudodorsal abdominal wall

Question 12

What does the internal iliac artery supply?

Answer 12

pelvic viscera
genitalia
becomes internal pudendal artery

Question 13

What does the external iliac artery supply?

Answer 13

pelvic limbs

becomes femoral artery

Question 14

What is the main nerve supply of the pelvic cavity?

Answer 14

pudenal nerve
sensory & motor
S1-S3 combined

Question 15

Describe the branches of the pudenal nerve & what they innervate.

Answer 15

caudal rectal nerve - external anal sphincter
perineal nerves - anus/perineum/scrotum
dorsal nerve of penis

Question 16

List the parasympathetic and sympathetic nerve fibres.

Answer 16

para:
S1-3 - pelvic nerve - pelvic plexus - viscera
sympa:
caudal mesenteric ganglion - hypogastric nerve - pelvic plexus - viscera

Question 17

Describe the components of the pelvic diaphragm.

Answer 17

coccygeus muscle
levator ani muscle
parturition/defication/wagging

Question 18

Describe the coccygeus muscle.

Answer 18

o - ischiatic spine
i - lateral tail
innervation - caudal rectal nerve
bilat action - tail between legs
unilat action - wag

Question 19

Describe the levator ani muscle.

Answer 19

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

Question 20

Define the perineum.

Answer 20

part of body surrounding end of digestive/urinary tract

Question 21

What are perianal/circumanal glands?

Answer 21

sebaceous glands in epidermis in perineal region

NOT ANAL GLANDS

Question 22

Draw & label a schematic of the arterial supply for the pelvic cavity.

Answer 22

add photo