Help yourself in learning about human respiratory system by printing these diagrams of lungs for free! Find a handy of free and printable anatomy diagram of the lung for any educational purpose here. All these diagrams have been collected in high definition and quality. The human lungs are a pair of large, spongy organs optimized for gas exchange between our blood and the air. Our bodies require oxygen in order to survive. The lungs provide us with that vital oxygen while also removing carbon dioxide before it can reach hazardous levels. To know more about your lungs, this is the first lung diagram with the details.