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long bone


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A bone consisting of a long hollow, roughly cylindrical shaft (diaphysis) of compact bone, with bulbous ends (the epiphyses) of spongy bone. Examples include the tibia, humerus, and the femur. The long bones are so named because of their elongated shape (the length exceeds the width), not because of their size; the three bones in each finger are long bones even though small. Long bones are adapted for weight-bearing and can withstand considerable stress; they also serve as levers for sweeping, speedy movements.

Subjects: Sports and Exercise Medicine.


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