ischium and pubis

ischium

posteroinferior region, L shaped or arc shaped

the ischium consists of a thicker, superior __ and thinner inferior __

body; ramus

ischial spine

triangular projection, located posterior to the acetabulum and projects medially

attachment point for sacrospinous ligament

ischial spine

lesser sciatic notch

inferior to ischial spine

nerves and vessels that serve the perineum pass through this notch

lesser sciatic notch

ischial tuberosity

rough, thickened area of inferior surface of ischial body

pubis

paired, v shaped, forms anterior region of coxal bone

superior pubic ramus

branch of the pubis issuing from a flat body

inferior pubic ramus

branch of the pubis issuing from a flat body

public crest

thickened anterior border of pubic body

pubic tunercle

knob-like lateral end of pubic crest

attachment point for inguinal ligament

pubic tubercle

obturator foramen

large opening between the pubis and the ishium

few vessels and nerves pass through this opening

obturator foramen

the obturator foramen is almost completely closed off by

a fibrous obturator membrane

pubic symphysis

a fibrocartilaginous disc that joins the two pubic bones

public arch

formed by the inferior pubic rami and the ischial rami of both coxal bones

the angle of the pubic arch helps to distinguish

male from female pelves

the female has a

wider angle in female pelves

shallower and lighter female pleves provide more room in the

true pelvis for child bearing purposes