LOBATION, BRONCHIAL TREE AND ARTERIAL SUPPLY OF PACA LUNG (Agouti paca, LINAEUS, 1766)

Abstract

Lungs are the main organs of the respiratory system and the morphological knowledge of lobation, bronchial tree and arterial vascularization becomes indispensable on clinics and surgery practice. The pulmonary trunks of 10 lungs were filled with latex and the anatomical sets were put in a 10% formaldehyde aqueous solution. By dissection, it was observed that, in 100% of the cases, the right lung was constituted by cranial, medium, caudal and accessory lobes. The medium lobe was divided into cranial and caudal portions. The left lung presented a cranial lobe, divided into cranial and caudal portions, a caudal lobe and a little accessory lobe. The right pulmonary artery gave off two branches to the cranial lobe, besides branches to the cranial and caudal portions of the medium lobe, and branches to the accessory and caudal lobes. The left pulmonary artery gave off two branches to the cranial and one to caudal portions of the cranial lobe; the left caudal lobe was supplied by the left pulmonary artery continuation, which gave off five to six dorsal and seven to eight ventral branches. There was no variation on the studied lungs as for lobes or bronchial tree model.

KEY WORDS: Agouti paca, lungs, pulmonary artery, rodent.