anatomy - pelvis and male reproductive system

Question 1

what are the 3 major bones of the pelvis (not the 3 parts)

Answer 1

sacrum - posterior and medial
pelvic bones - laterally
symphysis pubis - anterior

Question 2

when does movement occur at the joints of the pelvis

Answer 2

generally it doesn’t

only in a state of disease or pregnancy

Question 3

what are the 3 pelvic bones

Answer 3

ilium - superio-lateral
ischium - inferior
pubis - anterior

Question 4

what abdominal organs are found in the iliac fossa

Answer 4

caecum, appendix

sigmoid colon

Question 5

what foramen lies between ischium and pubis

Answer 5

obturator foramen
almost completely occluded by muscle
allows passage of obturator nerve

Question 6

what is the division between true and false pelvis

Answer 6

arcuate line - also known as pelvic inlet

Question 7

male pelvic features: 
general structure
false pelvis
true pelvis 
pelvic inlet
pelvic outlet
sub-pubic angle
obturator foramen
acetabulum

Answer 7

general structure - thick and heavy
false pelvis - deep
true pelvis - narrow and deep
pelvic inlet - heart shaped
pelvic outlet - smaller
sub-pubic angle - narrow
obturator foramen - round
acetabulum - large

Question 8

female pelvic features: 
general structure
false pelvis
true pelvis 
pelvic inlet
pelvic outlet
sub-pubic angle
obturator foramen
acetabulum

Answer 8

general structure - thin and light
false pelvis - shallow
true pelvis - wide and shallow
pelvic inlet - oval and rounded
pelvic outlet - larger
sub-pubic angle - wide
obturator foramen - oval 
acetabulum - small

Question 9

what are the pelvic walls lined with

Answer 9

striated skeletal muscle

Question 10

what makes up the lateral pelvic wall

Answer 10

obturator internus

sits over the obturator foramen (doesn’t completely occlude it) and up to the arcuate line of the pelvis

Question 11

what makes up the superior pelvic wall

Answer 11

piriformis

Question 12

what makes up the most posterior part of the pelvic floor

Answer 12

coccygeus

Question 13

what is another name for the pelvic floor

Answer 13

pelvic diaphragm

Question 14

what is the function of the pelvic floor

Answer 14

supports the pelvic viscera
prevents prolapse
maintenance of urinary and faecal continence

Question 15

what 3 muscles make up levator ani

Answer 15

iliococcygeus
pubococcygeus
puborectalis

Question 16

which muscle is important for faecal continence

Answer 16

puborectalis
pulls the perineal flexure towards pubis bone
kink maintains faeces in the rectum until it is relaxed

Question 17

what 2 fossae are present below the pelvic floor

Answer 17

ischio anal fossa
ischio rectal fossa
fat filled spaces
important for the expansion of the canals during defection and childbirth
pilonidal cysts can also form here

Question 18

what muscles overlie the labia majora

Answer 18

bulbospongiosus

Question 19

what muscles lie along the pubic part of the pelvis lateral to the labia majora

Answer 19

ischiocavernosus