
Pulmonary vein
The pulmonary vein does not accompany the respiratory passageways but travels alone through lung tissue. It will join the secondary bronchi and pulmonary artery near the root of the lung. 200x

Pulmonary vein
The pulmonary vein does not accompany the respiratory passageways but travels alone through lung tissue. It will join the secondary bronchi and pulmonary artery near the root of the lung. 200x

Alveoli
The pulmonary vein does not accompany the respiratory passageways but travels alone through lung tissue. It will join the secondary bronchi and pulmonary artery near the root of the lung. 200x

Alveolar duct
The pulmonary vein does not accompany the respiratory passageways but travels alone through lung tissue. It will join the secondary bronchi and pulmonary artery near the root of the lung. 200x

Alveolar sac
The pulmonary vein does not accompany the respiratory passageways but travels alone through lung tissue. It will join the secondary bronchi and pulmonary artery near the root of the lung. 200x