Bones of the Pelvic Girdle (Mostly Os Coxae)

What bone fuses with the ilium and ischium at the acetabulum?

Pubis

The pelvis girdle refers to what bones only?

Right & Left os coxae

The femur articulates with a deep, curved depression on the lateral surface of the os coxae called the?

acetabulum

The head of each femur fits snugly into the...?

acetabulum of each os coxae

The os coxae is known as what?

hip bone

The acetabulum contains a smooth curved surface which is C-shaped and articulates with the femoral head. This called the?

lunate surface

The pelvis protects and supports what?

the viscera in the inferior part of the ventral body cavity

The wide, fan-shaped portion of the ilium is called the 1). The ala terminates inferiorly at a ridge called the 2) on the medial surface of the ilium. On the medial side of the ala is a depression termed the 3).

1) Ala 2) Arcuate line 3) Iliac fossa

What are the 9 bony features of the Ilium?

1) Ala - lateral surface 2) Arcuate line 3) Iliac fossa - medial surface 4) Iliac crest 5) Anterior superior iliac spine (ASIS) 6) Anterior inferior iliac spine (AIIS) 7) Posterior superior iliac spine (PSIS) 8) Posterior inferior iliac spine (PIIS) 9) Greater sciatic notch

Each os coxae articulates what? (3 things)

1) Anteriorly with the other os coxae (where pubis bones meet) 2) Posteriorly with the sacrum (sacroiliac joint) 3) Laterally with the femur (iliofemoral joint)

Each os coxae is formed from 3 separate bones. What are these 3 coxal bones?

1) Ilium 2) Ischium 3) Pubis

What are the 4 bony features of the ischium?

1) Ischial spine 2) Ischial tuberosity 3) Ischial ramus 4) Lesser sciatic notch

Posterior to the acetabulum, the prominent triangular 1) projects medially. The 2) is a semicircular depression inferior to the ischial spine. The posterolateral border of the ischium is a roughened projection called the 3). An elongated 4) of the ischium extends from the ischial tuberosity toward its anterior fusion with the pubis.

1) Ischial spine 2) Lesser sciatic notch 3) Ischial tuberosity 4) Ramus

The adult pelvis is composed of what four bones?

1) Sacrum 2) Coccyx 3) Right os coxae 4) Left os coxae

What are the 4 bony features of the pubis?

1) Superior pubic ramus 2) Inferior pubic ramus 3) Pubic crest 4) Pubic tubercle

The superiormost ridge of the ilium is the 1). The iliac crest arises anteriorly from a projection called the 2) and extends posteriorly to the 3). Located inferiorly to the ala of the ilium are the 4) and 5). The posterior inferior iliac spine is adjacent to a prominent 6), through which the sciatic nerve travels to the lower limb.

1) iliac crest 2) Anterior superior iliac spine 3) Posterior superior iliac spine 4) Anterior inferior iliac spine 5) Posterior inferior iliac spine 6) Greater sciatic notch

The ischial ramus fuses anteriorly with the 1) to form the ischiopubic ramus. The 2) originates at the anterior margin of the acetabulum. A roughened ridge called the 3) is located on the anterosuperior surface of the superior ramus, and it ends at the 4).

1) inferior pubic ramus 2) superior pubic ramus 3) pubic crest 4) pubic tubercle

At what age does the 3 bones that separate the hip fuse together?

13 - 15 years of age

Which bone is the largest of 3 coxal bones?

Ilium

Which coxal bone fuses with the Ilium?

Ischium