primary bronchiole
http://purl.obolibrary.org/obo/UBERON_0012067
A bronchiole that arises from a segmental bronchus and does not contain cartilage. [ http://en.wikipedia.org/wiki/Bronchiole#Primary_bronchioles http://openisbn.com/search.php?q=0123813611&isbn=1/ ]
Synonyms: proximal bronchiole