Question

18 the humerus is an example of a(n) ________ bone.

multiple choice

• irregular
• sesamoid
• flat
• short
• long

Explanation:

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<reasoning>

Identify the bone and its structural characteristics

Using the Bone Classification knowledge point

• The humerus is the upper arm bone extending from the shoulder to the elbow.
• It features a central shaft (diaphysis) and two expanded ends (epiphyses), which is the defining structural characteristic of a long bone.

Evaluate the given classification options

Using the Bone Classification knowledge point

• irregular: Bones with complex shapes (e.g., vertebrae).
• sesamoid: Small, round bones embedded in tendons (e.g., patella).
• flat: Thin, flattened, and usually curved bones (e.g., sternum).
• short: Cube-like bones roughly equal in length and width (e.g., carpals).
• long: Bones that are longer than they are wide, consisting of a shaft with heads at both ends (e.g., humerus).

</reasoning>

<answer>
<mcq-option>irregular</mcq-option>
<mcq-option>sesamoid</mcq-option>
<mcq-option>flat</mcq-option>
<mcq-option>short</mcq-option>
<mcq-correct>long</mcq-correct>
</answer>

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Answer:

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<reasoning>

Identify the bone and its structural characteristics

Using the Bone Classification knowledge point

• The humerus is the upper arm bone extending from the shoulder to the elbow.
• It features a central shaft (diaphysis) and two expanded ends (epiphyses), which is the defining structural characteristic of a long bone.

Evaluate the given classification options

Using the Bone Classification knowledge point

• irregular: Bones with complex shapes (e.g., vertebrae).
• sesamoid: Small, round bones embedded in tendons (e.g., patella).
• flat: Thin, flattened, and usually curved bones (e.g., sternum).
• short: Cube-like bones roughly equal in length and width (e.g., carpals).
• long: Bones that are longer than they are wide, consisting of a shaft with heads at both ends (e.g., humerus).

</reasoning>

<answer>
<mcq-option>irregular</mcq-option>
<mcq-option>sesamoid</mcq-option>
<mcq-option>flat</mcq-option>
<mcq-option>short</mcq-option>
<mcq-correct>long</mcq-correct>
</answer>

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