Iron ions are essential for human life.
1) Iron is a constituent of hemoglobin, of which red blood cells are composed. It is it that is responsible for the capture of oxygen, and the blood cells carry it to all systems of the body.
2) Also, iron is an integral part of many enzymes and proteins that are necessary for metabolism – the conversion of calories into energy, and other metabolic processes.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.