alveolar duct

(redirected from ductulus alveolaris)

al·ve·o·lar duct

1. the part of the respiratory passages distal to the respiratory bronchiole; from it arise alveolar sacs and alveoli;
2. the smallest of the intralobular ducts in the mammary gland, into which the secretory alveoli open.
Synonym(s): ductulus alveolaris

alveolar duct

A thin tubular structure that arises from respiratory bronchioles and gives rise to alveoli, which contain smooth muscle that constricts in response to parasympathetic stimulation and dilates in response to sympathetic stimulation. Alveolar ducts are lined by simple cuboidal cells.

al·ve·o·lar duct

(al-vē'ŏ-lăr dŭkt)
1. The part of the respiratory passages distal to the respiratory bronchiole; from it arise alveolar sacs and alveoli.
2. The smallest of the intralobular ducts in the mammary gland, into which the secretory alveoli open.
Synonym(s): ductulus alveolaris.