![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Pulmonary vein
Pulmonary veins carry oxygenated blood from the pulmonary capillaries back to the left atrium. These vessels do not accompany the smaller respiratory passageways; instead, they travel alone, frequently seen in the connective tissue septa that subdivide the lung. 100x
![Pulmonary vein <p>Pulmonary veins carry oxygenated blood from the pulmonary capillaries back to the left atrium. These vessels do not accompany the smaller respiratory passageways; instead, they travel alone, frequently seen in the connective tissue septa that subdivide the lung. 100x</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.B.PV_.01.P01.png)
Pulmonary vein
Pulmonary veins carry oxygenated blood from the pulmonary capillaries back to the left atrium. These vessels do not accompany the smaller respiratory passageways; instead, they travel alone, frequently seen in the connective tissue septa that subdivide the lung. 100x
![Connective tissue septum <p>Pulmonary veins carry oxygenated blood from the pulmonary capillaries back to the left atrium. These vessels do not accompany the smaller respiratory passageways; instead, they travel alone, frequently seen in the connective tissue septa that subdivide the lung. 100x</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.B.PV_.01.P02.png)
Connective tissue septum
Pulmonary veins carry oxygenated blood from the pulmonary capillaries back to the left atrium. These vessels do not accompany the smaller respiratory passageways; instead, they travel alone, frequently seen in the connective tissue septa that subdivide the lung. 100x