Linfactic organs
Classified in Biology
Written at on 
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bronchi: there are 2 branches in which the trachea is divided - formed by cartílago rings-each one leads to a lung - the bronchi split into gradually narrower tubes inside the lungs(bronchioles)/ bronchioles: consistió of a layer of flatenned cells(endothelium)- coated by an abundant network of capilares that facilites the gas exchange/ lungs: 2 organs of great elasticity formed by (bronchi,bronchioles,bronchial tree, pulmonary alveoli, capillaries betwork)-located in the torathic cavity -protected by the ribs- separated from the abdomen by the diaphragm - sorrounded by the pleura : visceral, parietal