Función biológica que realiza una determinada especie:

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 kinds of molecules can pass through the cell membrane without any problem?

In the sentence "a mining company will consider the distribution of coal when deciding how to mine the coal," what does the word distribution mean?