Explanations of the major elements: oxygen, carbon, hydrogen, nitrogen, calcium, phosphorus, magnesium, potassium, sulfur, sodium, chlorine, iron and zinc.

Oxygen (O) Human beings obtain this element from the air. It enters a person's bloodstream through the lungs. The blood carries oxygen to the cells of the body. In the cells, oxygen combines with chemicals obtained from food. Energy produced during this process makes it possible for each cell to perform its function in the body. Also, oxygen atoms are present in water and water is essential to all life. It is present in many …

…consumption. Symptoms associated with zinc deficiency include slow or impaired growth, decreased resistance to infections, slower wound healing and loss of hair. The senses and smell and taste an also be impaired by low zinc levels. Taking large amounts of zinc supplements, seventy or more times the recommended daily allowance, may cause nausea, abdominal cramps, and vomiting within 3-10 hours after taking the supplements. These symptoms can be reversed or diminished by discontinuing supplement use.