Pulmonary vein

A pulmonary vein located near the surface of the lung travels in thin connective tissue septa and is not associated with a respiratory passageway. Oxygenated blood in these vessels drains mostly into pulmonary veins. 200x

A pulmonary vein located near the surface of the lung travels in thin connective tissue septa and is not associated with a respiratory passageway. Oxygenated blood in these vessels drains mostly into pulmonary veins. 200x

Each lung projects into an internal body cavity, the pleural cavity, and is covered by a serous membrane (serosa), called visceral pleura. Pleura is composed of a simple squamous epithelium (mesothelium) overlying a layer of connective tissue that contains blood vessels and elastic fibers.

This image was taken of a slide in the University of Mississippi collection.