The Greek word plastikas means molded. The ovoid, plate-shaped, ribbon-shaped or star-shaped organisms located in the cytoplasm of plant cells are called plastids. It is the largest organelle in the cytoplasm. Fungi and bacteria do not have plastids, but do have chromatophores. Blue green algae or cyanobacteria (BGA) contain chlorophyll in their thylakoids. Animal cells do not have plastids.