Airway |
   Epithelium |
     Epithelial cells |
     Clara cells |
     Neuroendocrine cells |
   Smooth muscle cells |
Parenchyma |
   Clara cells |
   Macrophages |
   Endothelial cells |
Pulmonary tumors |
   Adenocarcinomas |
   Squamous cell carcinoma |
   Small cell carcinoma? |
   Carcinoid tumors |
Vasculature |
   Endothelial cells |
   Platelets |
   Smooth muscle |