The ends of the femur are covered in a smooth, slippery substance called articular cartilage. This cartilage protects and cushions the bone when you bend and straighten your knee. The normal anatomy of the knee.
Parents should let them be curious and take adventures but limit them to a certain amount or how far they can go a day.
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u do not wipe ur poop man that just nastyyyy
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D.cardio-respiratory endurance
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