Question

30 elements sources and diseases throws elements​

Answer 1

Trace elements (or trace metals) are minerals present in living tissues in small amounts. Some of them  are known to be nutritionally essential, others may be essential (although the evidence is only suggestive or incomplete), and the remainder are considered to be nonessential. Trace elements function primarily as catalysts in enzyme systems; some metallic ions, such as iron and copper, participate in oxidation-reduction reactions in energy metabolism. Iron, as a constituent of hemoglobin and myoglobin, also plays a vital role in the transport of oxygen.

Answer 2

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