The Nucleus is the center of and atom, consisting of Protons and Neutrons. It is most of the mass.
The Ribosome is a cell that makes proteins form DNA directions. It is a very important job is the cell
The Cytoplasm is the part of a cell that holds organelles and place them for chemical reactions
The Mitochondria is the part of a cell that carries out cellular respiration which provides energy to the cell and then to the body.
The Cell Membrane
The Cell Membrane is a part of the cell that controls what goes in and out of the cell, it filter all the bad stuff out and the good thing can come in.