VAN 221: Veterinary Splanchnology and Applied Anatomy (1+1)

BRONCHI
(Ox, Sheep, Goat, Horse, Pig, Dog, Rabbit, Fowl)

Ox

• The two bronchi are the terminal branches of the trachea. They are right and left
• The right is shorter than the left. Each passes outwards and backwards and enters the hilus of the corresponding lung and branches like a tree within the lung substance and terminates in air sacs. There is an additional bronchus -the apical bronchus to the apical lobe of the right lung detached about the level of the 3rd rib
• Each bronchus is related above to the branches of the bronchial artery and bronchial lymph glands and below to the divisions of pulmonary artery and vein
• The structure is the same as that of the trachea except that the plates of cartilage replace the cartilaginous rings

Species difference

Sheep and Goat

• It resembles ox

Horse

• There are only two chief bronchi

Pig

• As in ox.
• The apical bronchus to the apical lobe of the right lung detached about the level of the third rib

Dog

• Each bronchus divides into two branches before it enters the hilus of the lung

Rabbit

• There are two chief bronchi, right and left

Fowl

• There are two chief bronchi