Morphologic caracteristics of cells on the erytrocytic series of the Caiman crocodilus yacare (Daudin, 1802; Reptilia, crocodilia)

Abstract

This research aimed to study the anatomical characteristics of the agouti's lung, particularly the lobation, the distribution of pulmonary artery's ramus, and its relation with bronchi. Ten heart-lungs blocks were used; in eight of these blocks, colored Neoprene Latex was injected in the pulmonary artery. Afterwards, the samples were fixed in aqueous solution of formoaldehyde 10%, and the arterial ramus dissected on the parenchyma of the organ. Into the two remained lungs colored vinyl acetate was injected and soon after the pieces was submitted to corrosion with chloridric acid 30%. It was observe that the lung of the agouti is divided outside by pronounced fissures that separate the pulmonary lobes, as much on the right side as on the left. The right one, with four lobes: cranial, medial, caudal and accessory, and the left lung with two lobes: cranial and caudal. The cranial lobe is divided into two segments: cranial e caudal. From the right main bronchus originates the right cranial, medial, right caudal and accessory lobes bronchi. The left main bronchus originates the cranial lobar bronchus, which bifurcates, giving rise to the to cranial and caudal portion branches of left cranial lobe, continuing to the caudal lobe. The right pulmonary artery originates, respectively, branches to the cranial, medial, accessory and caudal lobes, and the left one originate, separately, ascendant and descendant branches to the cranial and caudal segments of left cranial lobe, and proceed to the caudal lobe. It can be concluded that pulmonary arteries follow the bronchi ramification characterizing the bronchoarterial anatomic-surgical segmentation.