Cell structure: Cell wall: The protective coating for a plant cell. Cell membrane:Is a layer of tissue that surrounds a cell. Cytoplasm: Is the clear, gel-like substance outside the nucleus of the cell of plants and animals. Vacuole: A fluid-filled cavity within the cytoplasm of a cell, surrounded by a membrane that usually encloses food, water, or air. Nucleus: The nucleus is the centre core of an atom that has a positive charge and that contains most of the atom's mass, or the central heart of an organization or group. Mitochondria: Any of various very small, usually rodlike structures found in the cytoplasm of eukaryotic cells and that serve as a centre of intracellular enzyme activity which produces the ATP needed to power the cell. Ribosome: Is a tiny particle made up of nucleic acids and proteins that exist in large numbers in the gel-like substance in between every cell in the body. chroplast: A Chloroplast is a part of a plant that has chlorophyll and conducts photosynthesis.