DRUG CLASS AND MECHANISM: Rosuvastatin is an oral drug for lowering blood cholesterol levels. It belongs to a class of drugs called HMG-CoA reductase inhibitors, more commonly referred to as  statins ..RUG CLASS AND MECHANISM: Rosuvastatin is an oral drug for lowering blood cholesterol levels. It belongs to a class of drugs called HMG-CoA reductase inhibitors, more commonly referred to as  statins ..
Natural numbers are naturally used for counting apples (and other things) so they are sometimes called counting numbers. Even some animals other than humans can count and add, so they must be natural. Minus two apples isn't very natural so negative numbers are not included.
1 All natural numbers are also integers. Since natural numbers are the set of numbers {1, 2, 3, 4...} they are also included in the set of integers.  Whole numbers. All whole numbers are also integers. Since whole numbers are the set of numbers {0, 1, 2, 3...} they are also part of the set of integers.