Abstract
Influences by the contaminated air upon the lower respiratory tract, especially the trachobronchial tree were studied histologically and patho-physiologically. Histologically, mucosa of the lower respiratory tract of the germ free animal, the normal grown animal and SO2 gas exposed animal were examined and self defence mechanism was demonstrated on the normal grown animal as compaired with the germ free animal.
As concerning with absorbable function, cilia movement and influences upon it by the temperature, the moisture and the osmosis in the tracheobronchial tree were studied. Absorption of the sulfa dioxide into the blood through the mucosa of the respiratory way was measured. Also absorption of the Iron-Dextran into the bronchotrcheal mucosa was examined by the erectron-microscope.
