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In exactly 15 words can you explain how the arm bends and straightens?

In exactly 15 words can you explain how the arm bends and straightens?
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23 votes
In exactly 15 words can you explain how the arm bends and straightens?

User Marco Lazzeri
by
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1 Answer

5 votes

The biceps and triceps act against one another to bend and straighten the elbow joint

User Samizdis
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