in the bronchial submucosa there are ache-positive nerve plexuses which arise from three sources : ( 1 ) the adventitial plexus in bronchioles , or the subchondral plexus in bronchi , ( 2 ) the perimuscular nerve plexus , and ( 3 ) ache-containing nerves associated with the bronchial artery .
C0225601
bronchial submucosa
C0006255
bronchi