Answer:
The answer is a. they are much like empty rooms.
Explanation:
Cells are pretty much the opposite of empty rooms. There are many organelles and processes happening in them, so there's no space for empty rooms. Even when there are spaces, which anyway would be full of liquid, these spaces have a purpose.
Answer:
the process of metabolism works to make it possible, when its seems liie being impossible.. so?
The ans. is vein and capillaries transporting and importing blood from and to the body system.