Lobar bronchus to right caudal lobe

The lobar bronchus for the right caudal lobe is a major branch of the bronchial tree, dedicated to ventilating the largest lobe of the right lung in most domestic mammals.

This second-generation bronchus is the continuation of the right main bronchus after the origin of the bronchi for the cranial, middle, and accessory lobes. It extends caudally and dorsally to ventilate the right caudal lobe, which forms the most voluminous and posterior part of the right lung.

• Dog and Cat: Very well developed, ventilating the right caudal lobe, which is the largest of the four lobes of the right lung.

• Ruminants: Also well developed, supplying the right caudal lobe, a major pulmonary structure in these species.

• Horse: The right lung of the horse is less lobed, but the corresponding bronchus is present and ventilates the large caudal region of the right lung.

In humans, the right lung is divided into three lobes (upper, middle, lower). The lobar bronchus for the right caudal lobe in animals is homologous to the right inferior lobar bronchus in humans, which then divides into segmental bronchi to ventilate the right lower lobe.