Pelvis osteology

Question 1

functions of the pelvis

Answer 1

weight transfer
withstand compression of other forces
provide attachment for powerful muscles

Question 2

what makes up bony pelvis

Answer 2

hip bones - ilium, ischium, pubis
sacrum
coccyx

Question 3

blood vessels of the pelvis

Answer 3

common iliac arteries (internal and external)

Question 4

branches of anterior division

Answer 4

umbilical artery - branches into superior vesical artery that supplies fundus of urinary bladder
obturator artery - vulnerable in hernia op because it lies posterior to lacunar ligament, supplies medial muscles of thigh
inferior vesicle (in males)
uterine artery - replaces ductus deferens in males, main supply to uterus, enlarges during pregnancy
vaginal artery - replaces inferior vesical artery of male
internal pudendal artery - leaves below piriformis
inferior gluteal artery - supplies pelvic diaphragm, butt, post thigh

Question 5

branches of posterior division

Answer 5

iliolumbar artery - supplies iliacus, psoas major, quadratus, anastamoses with lumbar arteries
lateral sacral - supplies spinal meninges
superior gluteal arteries - supplies gluteal muscle

Question 6

ovarian artery

Answer 6

anastamoses with uterine artery in broad ligament

supplies ovary and uterine tube

Question 7

the superior rectal arteries

Answer 7

at s3 divides into right and left

anastamoses with middle rectal and inferior rectal

Question 8

ovarian fossa relations

Answer 8

external iliac vessels superiorly
obliterated umbilical anteriorly
ureter and internal iliac vessel posteriorly
obturator nerve and vessels lateral to it