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What I A Cell A cell is the smallest part of any living thing. There are many parts of a cell. Each part of a cell completes a certain function for the cell. Every cell has organelles in it. Cytoplasm Cytoplasm is a gel-like material inside the cell. It contains water and nutrients for the cell. The cytoplasm holds all the organelles in a cell in place. Nucleus The nucleus is the most important part of a cell. It directs the activity of a cell. It contains chromosomes with the DNA. Mitochondria Mitochondria are membrane-bound organelles, and like the nucleus have a double membrane. The mitochondria breaks food and release energy to the cell. Lysosomes Lysosomes are chemicals used digest waste such as: fats, carbohydrates, proteins, etc. from the cell. Without these your cells would be dirty. Vacuoles Vacuoles are places where food and energy are stored. So if a cell runs out of energy it can use the stored energy to cooperate properly.