The document summarizes key cellular organelles and their functions: - The nucleus is the control center of the cell containing genetic material and creating ribosomes. - The cytoplasm fills the cell volume and is where chemical reactions occur, suspending organelles. - The endoplasmic reticulum processes and metabolizes proteins and fats, with ribosomes on the rough ER. - Mitochondria are the powerhouses generating energy through cellular respiration. - Lysosomes dissolve molecules and degrade old cell structures. - Chloroplasts trap light energy through photosynthesis to produce carbohydrates in plants.