Mucopolysaccharides in bronchial secretion of children.

The diseases of respiratory system are nowadays one of the important medical, 
economical and social problems of modern civilization. A common symptom of 
these diseases regardless of their etiology, character, klinical manifestation and morphological 
findings is hypersecretion of bronchial sputum. Tracheobronchial mucus is produced by 
mucous bronchial glands and goblet cells. This mucus represents at physiological 
condition about 5 micrometer thick cover on mucous of nasopharynx, larynx, 
trachea, bronchi up to terminal bronchioles. Protective function of mucus cover 
resposes in mechanical and humoral barrier and also in removing the 
inhaled particles and their transport to the upper part of the 
respiratory system. In spite of the fact, that bronchial secretion has 
an important role in protective mechanism and in thermal and water 
exchange of respiratory tract, this secretion is not sufficiently scrutinized mainly 
of children yet. 