The textbook outlines the fundamentals of bioenergetics and cybernetics of bioche¬mical reactions; describes the properties of solutions and their role in biochemical pro¬cesses; presents modern concepts of electrode processes; explains peculiarities of surface phenomena and their value for the vital activity of the body; dwells on the properties of dispersion systems and biopolymer solutions. Special emphasis is placed on biogenic ele¬ments and their properties viewed through the spectacle of modern concepts of atomic and molecular structure, and chemical bonds. The authors touch upon topical problems of ecology. The textbook is intended for English-speaking students of higher education estab-lishments — medical universities, institutes, and academies, pharmaceutical, biological, and eco¬logical specialties.