Question

The appendicular skeleton in an adult consists of:

• A. 126 bones
• B. 206 bones
• C. 80 bones
• D. 120 bones

Answer 1

The Correct Option is A

The correct option is (A): 1260bones.

Answer 2

The adult human skeleton is split into two parts: the axial skeleton and the appendicular skeleton. The question asks how many bones make up the appendicular part. Let's check each option.

1. 126 bones: The appendicular skeleton includes the bones of the upper limbs, lower limbs, and the pectoral and pelvic girdles that attach them to the trunk. Counting these out, arms and hands (each side: shoulder girdle plus arm, forearm, wrist, and hand bones) and legs and feet (each side: pelvic girdle plus thigh, leg, ankle, and foot bones) together add up to 126 bones.
2. 206 bones: This is the total number of bones in the entire adult human skeleton, axial and appendicular combined, not the appendicular skeleton alone.
3. 80 bones: This is the count for the axial skeleton, which covers the skull, vertebral column, ribs, and sternum, the central body frame rather than the limbs.
4. 120 bones: This number is close to the true count but falls short by 6; it does not match the actual tally once every limb and girdle bone is counted.

Since the full skeleton has 206 bones and the axial skeleton accounts for 80 of them, the appendicular skeleton makes up the remaining 126.

So the correct answer is 126 bones.