Which one of the following is part of the appendicular skeleton?

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BlackTom AI · Accepted Answer

Question restated: Which one of the following is part of the appendicular skeleton?
Options: Fibula, Hyoid, Sternum, Skull, Sacrum

Option 1: Fibula. The fibula is one of the long bones of the leg, belonging to the appendicular skeleton which comprises the limbs and their girdles. This makes it a correct example of appendicular skeletal elements.
Option 2: Hyoid. The hyoid bone is located in the neck and does not articulate with other bones directly; it is considered part of the axial skeleton due to its association with the skull base and its central location along the vertical axis.
Option 3: Sternum. The sternum, or breastbone, is a central chest bone that connects to the ribs; it is part of the axial skeleton because it supports the thoracic cage 
and vertebral column rather than forming part of the limbs or their girdles.
Option 4: Skull. The skull houses the brain and sensory organs and is a primary component of the axial skeleton, serving as the protection and framework of the head rather than the limbs.
Option 5: Sacrum. The sacrum is a large triangular bone at the base of the spine, formed by fused vertebrae, and is categorized under the axial skeleton since it relates to the vertebral column and pelvic region rather than the limbs.

Summary: Among the options, the fibula is the only bone that belongs to the appendicular skeleton, while the hyoid, sternum, skull, and sacrum are axial bones. The distinction hinges on whether the bone participates in the limbs and their girdles (appendicular) or lies along the axis of the body (axial).

Which one of the following is part of the appendicular skeleton?

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