Synonyms: organ mucosa of bronchus principalis primary bronchus mucous membrane primary bronchus mucosa bronchus principalis organ mucosa mucous membrane of main bronchus primary bronchus organ mucosa principal bronchus mucosa of organ mucous membrane of principal bronchus primary bronchus mucosa of organ principal bronchus organ mucosa mucosa of organ of main bronchus organ mucosa of main bronchus mucosa of organ of primary bronchus main bronchial mucosa main bronchus mucosa organ mucosa of principal bronchus mucous membrane of primary bronchus mucosa of organ of bronchus principalis mucosa of bronchus principalis bronchus principalis mucosa of organ main bronchus mucosa of organ mucosa of primary bronchus bronchus principalis mucous membrane main bronchus mucous membrane main bronchus organ mucosa mucosa of organ of principal bronchus mucosa of principal bronchus organ mucosa of primary bronchus principal bronchus mucosa principal bronchus mucous membrane mucous membrane of bronchus principalis bronchus principalis mucosa