Except: Cells need energy to survive.
That's the Answer.
They are living organisms. Not a very good question is there more to it
OK. First, there's the heart. Then there's the blood vessels. The arteries. Then the veins. And then there's the capillaries. <span />
Dehydration because animals can only live so long with water
I think it’s the first one - a , but I could be wrong
