Skeletal system and nervous system force and energy Air and
water _________ are man made
objects that onbits the earth.
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Bones provide calcium that is essential for the proper functioning of the nervous system. The skull protects the brain from injury. The vertebrae protect the spinal cord from injury. Sensory receptors in joints between bones send signals about body position to the brain.
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skeletal system and nervous force and energy air and water are non living objects
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