* Hip bone is a large irregular bone. It consists of three parts, the ilium superiorly, the pubis anteroinferior, and the ischium posteroinferiorly. These parts join each other at the acetabulum.
* An oval opening called the obturator foramen separates the pubis and ischium.
* The acetabulum articulates with the head of the femur to form the hip joint. The pubic parts of the two hip bones meet anteriorly to constitute the pubic symphysis.
* The two hip bones form the pelvic or hip girdle. The bony pelvis consists of the two hip bones along with the sacrum and coccyx.
Ilium
* The ilium forms the upper expanded plate-like part of the hip bone. Its lower part constitutes the upper two-fifths of the acetabulum.
* It consists of two ends, three borders, and three surfaces.
* It comprises the iliac crest, anterior-superior iliac spine, anterior-inferior iliac spine, posterior iliac spine, greater sciatic notch, iliac fossa, and gluteal lines.
Pubis
It forms the anteroinferior part of the hip bone and the anterior one-fifth of the acetabulum.
*It Comprises.
a. A body anteriorly, which articulates at the symphysis pubis.
b. A superior ramus superolateral, which enters the formation of the acetabulum.
c. An inferior ramus inferolateral, which extends from the body of the pubis to the ischial ramus.
Ischium
* The ischium forms the posteroinferior part of the hip bone, and the adjoining two-fifths of the acetabulum.
*It forms the posterior boundary of the obturator foramen. The ischium has a body, a ramus, the ischial spine, ischial tuberosity, and lesser sciatic notch.
Acetabulum
* It is an incomplete cup-shaped cavity on the lateral side of the hip bone in which the head of the femur fits.
* It includes the acetabular notch and the acetabular fossa.
* It is formed by the ilium superiorly, the ischium posteroinferiorly, and the pubis anteromedially.
Obturator Foramen
* It is a gap in the hip bone, situated anteroinferior to the acetabulum, between the pubis and the ischium.
* It is large and oval in the males and small and triangular in the females.
* It is closed by the obturator membrane except at the obturator groove, where obturator vessels and nerves pass out of the pelvis.
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* Hip bone is a large irregular bone. It consists of three parts, the ilium superiorly, the pubis anteroinferior, and the ischium posteroinferiorly. These parts join each other at the acetabulum.
* An oval opening called the obturator foramen separates the pubis and ischium.
* The acetabulum articulates with the head of the femur to form the hip joint. The pubic parts of the two hip bones meet anteriorly to constitute the pubic symphysis.
* The two hip bones form the pelvic or hip girdle. The bony pelvis consists of the two hip bones along with the sacrum and coccyx.
Ilium
* The ilium forms the upper expanded plate-like part of the hip bone. Its lower part constitutes the upper two-fifths of the acetabulum.
* It consists of two ends, three borders, and three surfaces.
* It comprises the iliac crest, anterior-superior iliac spine, anterior-inferior iliac spine, posterior iliac spine, greater sciatic notch, iliac fossa, and gluteal lines.
Pubis
It forms the anteroinferior part of the hip bone and the anterior one-fifth of the acetabulum.
*It Comprises.
a. A body anteriorly, which articulates at the symphysis pubis.
b. A superior ramus superolateral, which enters the formation of the acetabulum.
c. An inferior ramus inferolateral, which extends from the body of the pubis to the ischial ramus.
Ischium
* The ischium forms the posteroinferior part of the hip bone, and the adjoining two-fifths of the acetabulum.
*It forms the posterior boundary of the obturator foramen. The ischium has a body, a ramus, the ischial spine, ischial tuberosity, and lesser sciatic notch.
Acetabulum
* It is an incomplete cup-shaped cavity on the lateral side of the hip bone in which the head of the femur fits.
* It includes the acetabular notch and the acetabular fossa.
* It is formed by the ilium superiorly, the ischium posteroinferiorly, and the pubis anteromedially.
Obturator Foramen
* It is a gap in the hip bone, situated anteroinferior to the acetabulum, between the pubis and the ischium.
* It is large and oval in the males and small and triangular in the females.
* It is closed by the obturator membrane except at the obturator groove, where obturator vessels and nerves pass out of the pelvis.
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