Abstract
As the result of the comparative anatomical studies made on the development of eparterial bronchus employing Mogura, Oryctolangus cuniculus, Canis familiaris, Felis domestica, Capra hircus, Cercopithecus and Homo sapiens, it was found that in all cases, it was the eparterial bronchus of the right bronchus. The origin of eparterial bronchus is not necessarily confined to the right bronchus, for in the animals of Insectivora, Rodentia, Carnivora and Artiodactyla, it begins from the trachea on the level of the tracheal bifurcation or above, while in Primates it starts from the right bronchus.
Two arteries are distributed on the eparterial bronchus, one (A1) on the R. cranialis and the other (A2) on the R. caudalis of the bronchus in animal. In human being, however, this R. cranialis corresponds to the R. apicalis and R, ventralis or R, lobi superioris ventralis, while R, caudalis to the R. dorsalis or R. lobi superioris dorsalis.
