by immunolight and electron microscopy , the epithelioid , granule-containing cells within the wall of circumscribed portions of the thoracic aorta , the common carotid artery , the carotid body artery and those composing the carotid body itself of newly hatched chicks were shown to contain serotonin ( 5-ht ) , neuropeptide tyrosine ( npy ) and tyrosine hydroxylase ( th ) .
C0162859
common carotid artery
C0007277
carotid