Nucleus- Contains genetic material that controls the actvities of the cell.
Cytoplasm- Gel-like substance where most of the chemical reactions happen. It contains enzymes that control these chemical reactions.
Cell membrane- Holds the cell together and controls what goes in and out.
Mitochondria- These are where most of the reactions for respiration takes place. Respiration releases energy that the cell needs to work.
Ribosomes- These are where proteins are made in the cell.