How do the structures within the cell membrane the cell function within a larger system

An easy way to calculate the amount of energy available at each level is to what?

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

What field of science did harry hess study?