Question

question 39

the pelvic girdle does not include the ______.

a ilium

b femur

c ischium

d pubis

Explanation:

Identify the core question

The question asks to identify which of the listed bones is NOT part of the pelvic girdle.

Define the pelvic girdle components

The pelvic girdle (hip girdle) is formed by a single pair of hip bones, also known as the coxal bones or os coxae. Each coxal bone is formed by the fusion of three distinct bones:

• Ilium (the superior, largest region)
• Ischium (the posteroinferior region)
• Pubis (the anteroinferior region)

Evaluate the given options

• A - ilium: This is one of the three fused bones that make up the coxal bone of the pelvic girdle.
• B - femur: This is the thigh bone. It is part of the free lower limb (appendicular skeleton) and articulates with the pelvic girdle at the acetabulum, but it is not part of the pelvic girdle itself.
• C - ischium: This is one of the three fused bones that make up the coxal bone of the pelvic girdle.
• D - pubis: This is one of the three fused bones that make up the coxal bone of the pelvic girdle.

Formulate the final conclusion

Since the ilium, ischium, and pubis directly constitute the pelvic girdle, the femur is the bone that does NOT belong to the pelvic girdle.

Answer:

• (A) ilium
• (B) femur (Correct answer)
• (C) ischium
• (D) pubis