Why does a microscope stage have a small hole in it?

Many organs are involved in the processes of keeping the blood and the body clean. when poisonous or harmful substances are in the blood, they are absorbed by the and released in a less harmful form. when wastes are present in the blood, they are filtered out and removed from the body by the

A(n) is a molecule influences the way that a molecule reacts.

All eukaryotic cells contain small bodies called