The human body is made up of many different systems that work together to carry out the functions needed for life. The following systems help the body get oxygen and remove carbon dioxide waste. Apply what you learned about the heart to order these systems from the simplest to the most complex.

They formed the oceans.  as they melted water was formed and the water made the oceans

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.