lecture 6 pelvic region: viscera and the peritoneal cavity

Question 1

innervation of all pelvic structures

Answer 1

pudenal n (S2-S4) s2-s4 keep the penis off the floor

Question 2

levator ani

Answer 2

u-shaped muscle between the coccyx and the pubis

penetrated by the anus, vagina, and urethra

Question 3

ischiorectal fossa

Answer 3

between the levator ani and the lateral wall of the bony pelvis
contains fat, blood vessels, and nerves that supply the peritoneum

Question 4

pelvic gut tube

Answer 4

rectum and anus

Question 5

rectum

Answer 5

inferior most end of the large intestine
descends along the sacrum following the curvature of the sacrum and coccyx
covered by peritoneum

Question 6

anus

Answer 6

3 cm long
begins at the point where the rectum passes through the levator ani
two sphincters: internal and external anal sphincters

Question 7

internal anal sphincter

Answer 7

smooth muscle in the wall of the anus prevents leakage of fecal matter between defecations

Question 8

external anal sphincter

Answer 8

surrounds the most inferior part of the anus

skeletal muscle inhibition of defecation

Question 9

Urinary bladder

Answer 9

at the sacroiliac joint the ureters join the posterior corners of the bladder
collapsible muscular sac
rests along pelvic diaphragm posterior to the pubic symphysis

Question 10

urethra female

Answer 10

thin-walled tube that drains urine
1.5 inches long
bound to the anterior wall of vagina

Question 11

urethra male

Answer 11

8 inches long

3 regions: prostatic urethra, membranous urethra, and spongy urethra

Question 12

prostatic urethra

Answer 12

1 inch long passes through prostate

Question 13

membranous urethra

Answer 13

passes through the urogenital diaphragm

Question 14

spongy urethra

Answer 14

passes through the penis 6 inches long

Question 15

internal urethral sphincter

Answer 15

located at the bladder urethra junction
smooth muscle
prevents dribbling of urine between voidings

Question 16

external urethral sphincter

Answer 16

located at the transverse perineus muscle skeletal muscle

Question 17

inguinal canal

Answer 17

passage that the testes travel through in the anterior body wall to drop to the scrotum

Question 18

ovaries

Answer 18

lie within the peritoneal cavity against the lateral wall of the bony pelvis

Question 19

uterine tubes

Answer 19

receive the ovulated oocytes and provide a site for fertilization