The bone commonly called the sitting bone is which?

The bone commonly called the sitting bone is which?

• A. Coccyx
• B. Ilium
• C. Pelvis
• D. Ischium

Answer: (D)

The main idea is recognizing which pelvic bone forms the part you sit on. The term “sitting bone” refers to the ischial tuberosities—the rough projections at the bottom, back part of each hip bone. These sit bones bear most of your weight when you’re seated. The coccyx is the tailbone at the base of the spine, the ilium is the broad, upper part of the hip bone, and the pelvis is the entire ring of bones. Since the weight-bearing sit bones come from the ischium, that is the correct bone.

The main idea is recognizing which pelvic bone forms the part you sit on. The term “sitting bone” refers to the ischial tuberosities—the rough projections at the bottom, back part of each hip bone. These sit bones bear most of your weight when you’re seated. The coccyx is the tailbone at the base of the spine, the ilium is the broad, upper part of the hip bone, and the pelvis is the entire ring of bones. Since the weight-bearing sit bones come from the ischium, that is the correct bone.