NCBTMB Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What bone forms the posterior-inferior part of the coxal bone?

Pubis

Ilium

Ischium

The ischium is the bone that forms the posterior-inferior part of the coxal bone, which is also known as the hip bone. The coxal bone is made up of three primary components: the ilium, ischium, and pubis. The ischium provides structural support to the pelvis and is involved in weight-bearing when a person is seated. Its location at the lower part of the hip bone plays a crucial role in providing attachment points for muscles and ligaments, as well as contributing to the formation of the ischial tuberosities, which are important for sitting.

In contrast, the ilium is the largest part of the coxal bone and is positioned superiorly to the ischium, while the pubis is located anteriorly. The femur, on the other hand, is the thigh bone and is not a component of the coxal bone itself. This knowledge about the anatomy of the pelvis and the relationships among its components is essential for understanding the structure and function of the human skeleton.

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Femur

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