Pelvic Bones and Cavity lecture iii

Question 1

venous plexus

Answer 1

an interjoining, intercommunicating network of veins

Question 2

rectal venous plexus

Answer 2

interjoining rectal veins; drains rectum

Question 3

pampiniform (venous) plexus

Answer 3

located inside spermatic cord; drains testis

Question 4

inf mesenteric vein drains into the

Answer 4

splenic vein

Question 5

innervation of pelvic trunks: sacral sympathetic trunks an inferior continuation of _ trunks; they descend and converge to form the _

Answer 5

inferior continuation of lumbar sympathetic trunks; they descend and converge to form the ganglion impar

Question 6

main fcn of the sacral sympathetic trunks is to supply _, but by sending branches to inferior hypogastric plexus, they supply _

Answer 6

supply lower limb, but by sending branches to inferior hypogastric plexus, they supply rectum, prostate, uterus, etc

Question 7

hypogastric plexuses (superior and inferior): the fibers entering superior hypogastric plexus come from

Answer 7

lumbar splanchnic nerves

Question 8

hypogastric plexuses (superior and inferior): emerging from the superior plexus are the _ nerves which then descends and merge with the _ nerves

Answer 8

rt and lt hypogastric nerves; merge with the (parasympathetic) pelvic splanchnic nerves

Question 9

hypogastric plexuses (superior and inferior): the rt and lt hypogastric nerves which then descend and merge with the _ to form the _ plexuses, which thus contain both sympathetic and parasympathetic fibers, and which send fibers to the _

Answer 9

the rt and lt hypogastric nerves which then descend and merge with (parasympathetic) pelvic nerves to form the rt and lt inferior hypogastric plexuses, …which send fibers to pelvic viscera such as the rectum, bladder, prostate, seminal vesicles, cervix, and vagina

Question 10

pelvic splanchnic nerves: arise from the _ rami of spinal nerves _ and feed into the _ to help innervate parts of

Answer 10

ventral (anterior) rami of spinal nerves S2-S4, and feed into the inferior hypogastric plexuses to help innervate parts of LI, uterus, etc

Question 11

fibers in sacral sympathetic trunks come from

Answer 11

LUMBAR, not sacral, spinal segments (bc those sacral trunks are continuations of the lumbar sympathetic trunks)

Question 12

it is the the _ that carry fibers coming from the SACRAL spinal cord segments

Answer 12

PELVIC splanchnic nerves

Question 13

t/f: splanchnic nerves innervates abdominal and pelvic cavity viscera

Answer 13

true

Question 14

the sympathetic nervous sys exits the CNS from the _ and _ cord

Answer 14

thoracic and lumbar spinal cord

Question 15

the parasympathetic nervous sys exits the CNS from the _ and _; thus the pelvic splanchnic nerves are (parasympathetic/sympathetic?)

Answer 15

brain and the sacral spinal cord; parasympathetic

Question 16

the hypogastric/pelvic system of plexuses, which receives _ fibers via lumbar splanchnic nerves and _ fibers via pelvis splanchnic nerves, is a major source of pelvic viscera innervation

Answer 16

sympathetic fibers via lumbar splanchnic nerves and parasympathetic fibers via pelvis splanchnic nerves

Question 17

pelvic diaphragm is a muscular sheet (plus some fascia) covering _ and thus separating the _, for which it forms the floor; from the _ for which it forms the roof

Answer 17

the pelvic outlet and thus separating the pelvic cavity, for which it forms the floor; from the perineum, for which it forms the roof

Question 18

pelvic diaphragm consists of _ and _ muscles

Answer 18

levator ani and coccygeus

Question 19

levator ani which supports _ and is incomplete anteriorly for passage of _

Answer 19

pelvic organs and is incomplete anteriorly to allow for passage of urethra and vagina

Question 20

levator ani consists of 3 parts

Answer 20

1. puborectalis
2. pubococcygeus
3. iliococcygeus

Question 21

puborectalis forms a _-shaped sling around _

Answer 21

forms a U-shaped sling around anorectal jxn (medial)

Question 22

pubococcygeus is lateral to the _

Answer 22

lateral to the puborectalis (intermediate)

Question 23

iliococcygeus lateral to _

Answer 23

lateral to pubococcygeus