Answer:
Explanation:
Oxygen, hydrogen, carbon and nitrogen are the most abundant elements in the body by weight and make up about 96% of the weight of a human body. Calcium makes up 920 to 1200 grams of adult body weight, with 99% of it contained in bones and teeth.
Every 6 months it's recommended to have doctor and dental check-ups.
Heart disease ways you can keep your heart healthy would be one.