Pelvic Cavity I

Question 1

Perineum

Answer 1

Space between anus and scrotum
Region of pelvic outlet; contains the terminal ends of digestive and urogenital tracts

Question 2

Determination of sex in kittens

Answer 2

Increased anogenital distance in male kittens

Question 3

Pelvic diaphragm

Answer 3

Composed of levator ani and coccygeus mm.
Tone in both muscles retains pelvic viscera in the pelvic canal
Attaches laterally to pelvic wall and spreads caudomedially to close about the anal canal

Question 4

Ischiorectal fossa

Answer 4

Deep, wedge-shaped depression lateral to terminal portions of digestive and urogenital tracts
Located between anus and ischiatic tuberosity
Filled with fat in obese animals
Vessels and nerves that course through:
-Caudal gluteal vessels
-Internal pudendal vessels
-Pudendal nerve

Question 5

Hypogastric n.

Answer 5

Right and left hypogastric nn. contain postganglionic sympathetic fibers from caudal mesenteric ganglion
Innervates pelvic viscera

Question 6

Pelvic n.

Answer 6

Formed by preganglionic parasympathetic fibers from S1-S3 spinal nerves and visceral afferent fibers
Innervates descending colon, rectum, and urogenital organs
Courses with prostatic or vaginal a.

Question 7

Pelvic plexus

Answer 7

Contains sympathetic fibers from hypogastric n., parasympathetic fibers from pelvic n., and visceral afferent fibers

Question 8

Pudendal n.

Answer 8

Originates from ventral branches of sacral spinal nerves
Sensory innervation to rectum, internal and external reproductive organs, and perineal skin
Motor innervation to perineal muscles
Branches to: superficial perineal br., deep perineal n., caudal rectal nn.

Question 9

Terminal branches of aorta

Answer 9

External iliac a.
Internal iliac a.
Median sacral a.

Question 10

Internal iliac a.

Answer 10

Gives rise to umbilical a. and ends by dividing into caudal gluteal and internal pudendal aa.

Question 11

Round ligaments of bladder

Answer 11

Remnants of umbilical a. and are located in the lateral ligaments of bladder in the adult

Question 12

Caudal gluteal a.

Answer 12

Supplies blood to muscles outside of pelvis and caudal thigh region

Question 13

Internal pudendal a.

Answer 13

Supplies blood to pelvic viscera

Question 14

Internal pudendal a. in females

Answer 14

Gives rise to vaginal a. [(uterine a. (caudal vesical a.)] and artery of clitoris

Question 15

Structures supplied by vaginal a.

Answer 15

Uterus, vagina, urinary bladder, urethra, ureter, rectum

Question 16

Internal pudendal a. in males

Answer 16

Gives rise to prostatic a. (caudal vesical a.), artery of penis

Question 17

Structures supplied by prostatic a.

Answer 17

Prostate, ductus deferens, epididymis, urinary bladder, urethra, ureter, rectum