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The knee joint is vulnerable to injury. Why isn't it just built with tougher tissues

holding it together (like tough bone or cartilaginous structures)?

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Answer:It is also the most commonly injured joint. The reason for this is that the articulating bony surfaces (ends of the femur and tibia) don't form a very deep bony socket. As a result the knee relies mainly on ligaments and muscles for its stability.

Step-by-step explanation:

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