Parts of the Eukaryotic Cell Cell Membrane Selectively permeable = only certain things can enter/exit the cell Cytoplasm Contain the organelles of the cell Nucleus stores the hereditary information in its DNA; controls the cell Nuclear Membrane Double membrane that surrounds the nucleus, has nuclear pores Nucleolus Site where ribosomes are made Mitochondria Sites of chemical reactions – convert energy to ATP Ribosomes Most numerous organelle Synthesize proteins Endoplasmic Reticulum (ER) Functions as a highway along which molecules move from one part of the cell to another Two types: 1) Rough ER (has ribosomes) 2) Smooth ER (no ribosomes) Golgi Apparatus The processing, packaging, and secreting organelle of the cell Lysosomes Organelles that enclose enzymes that digest stuff Microtubules Contributes to the support, movement, and division of the cell Flagella Whipping action propels cells and makes them move Cell Wall Rigidity helps support and protect the plant cell Vacuole Fluid filled organelle that stores enzymes, metabolic wastes, and water Chloroplast Used to trap energy of sunlight during photosynthesis with chlorophyll