In what form are mineral substances presented in living organisms? The importance of minerals?

In living organisms, minerals can be in a solid state (for example, in the form of salts), in the form of ions, and also be part of various compounds. Minerals are found in a liquid medium (for example, cytoplasm).

Minerals play an important role in the functioning of the body. They are part of various compounds: enzymes, pigments, etc., are involved in the conduct of nerve signals.

For example, chlorine is contained in gastric juice, iodine is part of thyroid hormones, calcium and phosphorus are needed for the normal formation of bones and teeth.