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Cell wall (plant) A thick, rigid membrane that surrounds a plant cell. This layer of cellulose fiber gives the cell most of its support and structure. The cell wall also bonds with other cell walls to form the structure of the plant. Chlorophyll (plant) The green pigment in the leaves and stems of plants that is necessary for the production of plant food by photosynthesis. Chloroplast (plant) An elongated or disc-shaped organelle containing chlorophyll.
Cytoplasm. Cytoplasm is a jelly-like substance made mostly of water, and dissolved substances that holds all of the organelles in place. Everything inside the cell floats in the cytoplasm. Both plants and animals contain cytoplasm in their cells to hold everything in place!ell Wall. Cell walls are found only in plant cells. The main functions of the cell wall include supporting, protecting, and maintaining the shape of the plant cell. The cell wall is the outermost layer of the plant cell. Cell walls are porous to allow water, carbon dioxide, and other substances to pass through.