Os Coxae: Ilium, Ischium, and Pubis.

Ala of the ilium

The fan shaped portion of the ilium

Anterior superior iliac spine of the ilium

anterior end of the iliac crest

Posterior inferior iliac spine of the ilium

just superior to the greater sciatic notch

Greater sciatic notch of the ilium

Forms the greater sciatic foramen with sacrotuberous and sacrospinous ligament.

Iliac crest of the ilium

superior ridge of the ilium

Iliac tuberosity of the ilium

roughened surface superior to the auricular surface. serves as an attachment for the posterior sacroiliac ligaments.

Iliac fossa of the ilium

internal concavity in the ala of the ilium on the medial surface.

Arcuate line of the ilium

marks the pelvic brim

Auricular surface of the ilium

ear-shaped surface that articulates with the sacrum

Posterior gluteal line of the ilium

small line curving posteriorly in the ala of the ilium

Anterior gluteal line of the ilium

small line curving anteriorly in the ala of the ilium

Inferior gluteal line of the ilium

small line inferior to the anterior gluteal line, curving anteriorly.

Ischial spine of the ischium

medial projection separating greater and lesser sciatic notches; where 2 ischial spines are close together.

Lesser sciatic notch of the ischium

smaller depression inferior to the ischial spine

Ischial tuberosity of the ischium

projection on the postolateral border of the ischium. these are your “sit bones” because they support the weight of the body while seated

Ischial ramus of the ischium

extends inferiorly from the body of the ischium

Superior pubic ramus of the pubis

passes superolaterally to the acetabulum

Inferior pubic ramus of the pubis

passes posteriorly, inferiorly, and laterally to join the ramus of the ischial ramus

Pectineal line of the pubis

extends diagonally across the pubis and merges with the arcuate line

Symphysial Surface of the pubis

in contact with fibrocartilage disc to form pubis symphysis

Pubic Symphysis of the pubis

two pubis bones articulated

Pubic arch of the pubis

formed when two pubis bones are articulated

Pubic tubercle of the pubis

lateral end of the pubic crest

Pubic crest of the pubis

anterosuperior surface of the superior pubic ramus

Acetabulum of the os coxae

the socket that holds the femoral head

Obturator foramen of the os coxae

the large hole formed by the articulation of the ilium, ischium, and pubis