Plant and Animal Cell Organelles Picture Vocabulary Organisms and Environments Organelle A 3D illustration of an animal cell cross section A specialized part of a cell that has a specific function. Cell Membrane Cell Membrane The thin tissue that forms the outer surface of the cytoplasm of a cell and regulates the passage of materials in and out of the cell. Nucleus Cell Nucleus The organelle found in eukaryotic cells that contains genetic material responsible for controlling the activities of the cell. Cytoplasm Cytoplasm The jellylike material that makes up much of a cell inside the cell membrane and, in eukaryotic cells, surrounds the nucleus. Mitochondrion An organelle in the cytoplasm of eukaryotic cells that functions in energy production, the power factory of the cell. Vacuole Vacuole The organelle that stores water and food in both plant and animal cells. Chloroplast Chloroplast The green organelle in plant cells that converts light energy into chemical energy. Cell Wall Cell Wall Surrounds the cell membrane of a plant to give structure and protection to the cell.