Answer:
Phalanges {final answer}
Explanation:
The term phalanges refers to the bones in the toes and fingers.
Phalanges
Phalanges: The bones of the fingers and of the toes. There are generally three phalanges (distal, middle, proximal) for each digit except the thumbs and large toes. The singular of phalanges is phalanx.
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The answer is the upper back muscles. Hope I helped!