The so-called basement membrane of the capillaries of the lung.
D000818:Animals; D001485:Basement Membrane / Q000033:anatomy & histology; D002196:Capillaries / Q000033:anatomy & histology*; D003239:Connective Tissue Cells; D066298:In Vitro Techniques; D008168:Lung / Q000033:anatomy & histology*; D008854:Microscopy, Electron; D011650:Pulmonary Alveoli / Q000033:anatomy & histology*; D051381:Rats