Respiratory system, because the lungs and diaphragm would get the oxygen from the air, and transfer them to the circulatory system (that's a pretty basic explanation, there's much more to it)
<span>it probably break apart with cleavage, because the carbon atoms in graphite from sheets that could split apart easily in layers.</span>
In the milk food dye and soap experiment?
I know this sounds silly but I just took the test they were made in the stars or B