parenchyma

…capillary bed that constitutes the parenchyma, or the essential tissue of the lung itself. The parenchyma is the gas-exchanging tissue of the lung and has a surface area roughly comparable to that of a tennis court. Blood is distributed to the lung through the branching pulmonary artery, which subdivides with…

…fibre cells for support and parenchyma (thin-walled, unspecialized cells) for the storage of various substances.