Select the correct answer from each drop-down menu. Many body systems work together for proper functioning of the body and to maintain internal homeostasis.
The ? works to break down food eaten before exercising. The ?
takes in the nutrients obtained from the food. The body sweats as a mechanism to cool off, because the ? is working to flush out toxins.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

what tree

explanation: