You're either talking about Community which means grouping of different organs or population which is the grouping of the same organ
Its function is to provide energy for many cellular reactions.
There aren't any images to look at.
The average atomic mass of an element<span> is the sum of the </span>masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms<span> of that </span>element<span> that are of a given isotope).</span>
