The piano could only be played with 12 fingers, which is rare because humans normally have ten fingers.
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Explanation: osteoporosis occurs when there is an imbalance between bone formation and bone resorption.
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oxygenated blood is pumped to the body by the left ventricle.
Cell walls are thicker than cell membranes, and can therefore support the cell well. They keep a strong boundary for the protection of the cell, but can let water and some nutrients through to nourish and power the cell. Hope this helps! :)
