The<unk>  are small vessels that return blood from the larger bronchi and structures at the roots of the lungs. The right side drains into the azygos<unk>  while the left side drains into the left superior intercostal<unk> or the accessory hemiazygos<unk> 
The<unk>  are counterparts to the<unk>  arteries. The<unk> , however, do not return all of the blood supplied by the arteries; much of the blood that is carried in the<unk>  arteries is returned to the heart via the pulmonary<unk> .
Bronchial veins
Cardiac veins
Interlobar veins
Bronchiole
Internal jugular vein
Thoracic aorta
Aortic sinus
Subclavian vein