Creatinine is a toxin produced during the metabolism of meat in our body. Therefore, people with lots of muscles or who eat lots of meat always have a relatively high creatinine level, but it usually fluctuates in the normal range: 0.5-1.3mg/dL.
comet definition An object that enters the inner solar system, typically in a very elongated orbit around the sun. Material is boiled off from the comet by the heat of the sun, so that a characteristic tail is formed.
Comets are also known as dirty snowballs, small bodies of ice that are leftovers from the formation of the Solar System about 4.6 billion years ago. The comets we see in our â¦ solar system begin as chunks of rock and ice.