Published in Scientific Works. C Series. Veterinary Medicine, Vol. LVIII ISSUE 3
Written by Valerica Dănacu, Georgeta Radu, N Cornilă, V.Dănacu
Birds lung is composed of a network of interconnected intrapulmonary bronchi, gas exchange (hematosis) were achieved at the finest bronchioles. Left and right primary bronchi resulting from the bifurcation of the trachea to the syrinx cross the lung in caudo-cranial sense, their mucous continue with their lining air sacs. Their skeleton is made of cartilage plates from ring fragmentation. A tertiary bronchus together with adjacent lung parenchyma forms a structural unit called lobes. At the origin of air capillaries (atria) is observed atrial muscle circumscribing holes communication between para-bronchi and air capillaries. Elastic fibers are well developed surrounding smooth muscle fibers.
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bronchioles
