Thin liquid films in biomedical studies

Some main findings in the area of thin liquid films (TLF) in biological and medical science are reviewed and discussed. In a brief explanation of symmetrical and asymmetrical TLF, their formation and stability are presented. The main achievements in studies of films from phospholipid, protein and lipid–protein natural mixtures are summarized. Special attention is devoted to foam films composed of pulmonary surfactant and its constituents at the air–liquid interface since black foam film model offers new opportunities for studying the structure and stability of surfactant layer on the alveolar surface.