Although now it causes more harm than good because it doesn't really have a purpose, it is believed it once was used for humans to digest bone.
The system is called Taxonomy and was made by Swedish botanist Carlous Linnaeus
Answer: in the atom you can find: electrons and protons
Explanation:
You can find electrons in an atom because it is the negative energy that rounds the atom on the outside’s part.
Then, the protons are the positive energy that is on the atom’s inside.
Both of the energies are fused and it end on a neutron energy.