Kidneys produce hormones. Normal kidneys also make important chemical messengers called hormones. These hormones circulate in the bloodstream and regulate some body functions such as blood pressure, the making of red blood cells, and the uptake of calcium from the intestine.
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Rotation is how an object spins on its axis, like a planet, or a baseball or tennis ball with spin on it. Revolution is how an object revolves around another object, like the â¦ Earth around the Sun or a tether ball around the pole. 18 people found this useful. The most common use of the term rotation in math is in geometry. It is a form of translation, which is motion. Rotation refers to spinning about an axis point and is m â¦ easured in degrees, up to 360. It is often coupled with reflection to describe the motion of the object.