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Mineral functions and sources. Calcium:  needed for healthy bones and teeth, normal blood clotting, and nervous system functioning.  sources: dairy products, broccoli, cabbage, kale, tofu, sardines and salmon.
â¢Vital functions of the atmosphere include the following: â¦keeps Earth's temperature steady and habitable â¦protects from ultraviolet radiation â¦protects from meteorite impacts â¦provides oxygen for respiration and carbon dioxide for photosynthesis â¢The atmosphere consists primarily of nitrogen (78%) and oxygen (21%) gases.