The endocrine system is made of glands that secrete hormones. These hormones help regulate the organs and cells activity. The hormones among other things control your metabolism.
Adenine pairs with thymine (or uracil), and guanine pairs with cytosine.
In Science, a electron in an atom is always negative. The more electrons you have, the more negative a atom is. The more protons (Positives) you have, the more positive a atom is. To balance an atom out, have the same amount of Electrons and Protons.
You should make equal amount of both O2 and CO2
