What bones make up the bony pelvis?

What bones make up the bony pelvis?

• A. Two innominate bones (fusion of the ilium and pubis), the sacrum, and the coccyx
• B. The femur, tibia, and fibula
• C. The sacrum and coccyx only
• D. Two innominate bones and the sacrum

Answer: (A)

The bones that form the bony pelvis are two hip bones (often called innominate bones) together with the sacrum and coccyx. Each hip bone is a fusion of three parts—the ilium, ischium, and pubis—which come together to form one innominate bone. When you have two of these hip bones plus the sacrum at the back and the coccyx at the very bottom, you get the complete bony ring of the pelvis. That’s why listing two innominate bones along with the sacrum and coccyx is the right description. The other options miss components or include bones that aren’t part of the pelvis.

The bones that form the bony pelvis are two hip bones (often called innominate bones) together with the sacrum and coccyx. Each hip bone is a fusion of three parts—the ilium, ischium, and pubis—which come together to form one innominate bone. When you have two of these hip bones plus the sacrum at the back and the coccyx at the very bottom, you get the complete bony ring of the pelvis. That’s why listing two innominate bones along with the sacrum and coccyx is the right description. The other options miss components or include bones that aren’t part of the pelvis.