Interstitial cells at the boundary between alveolar and extraalveolar connective tissue in the lung.
D000818:Animals; D001158:Arteries / Q000648:ultrastructure; D002196:Capillaries / Q000648:ultrastructure; D003238:Connective Tissue / Q000648:ultrastructure*; D008168:Lung / Q000098:blood supply / Q000648:ultrastructure*; D008208:Lymphatic System / Q000648:ultrastructure; D008854:Microscopy, Electron; D011650:Pulmonary Alveoli / Q000648:ultrastructure*; D011817:Rabbits; D014680:Veins / Q000648:ultrastructure