A child who pitches in Little League baseball competition may risk arm injuries that would not occur in an adult. Why?
What will be an ideal response?
A child has a separate epiphysis at the proximal end of the ulna, and the stress of throwing a baseball can cause separation of this element at the metaphysis. Once the ulna has reached full length in an adult, the epiphysis has fused to the diaphysis and cannot be as easily pulled apart.
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