What is another word for lower respiratory tract?
Pronunciation: [lˈə͡ʊə ɹɪspˈɪɹətəɹˌɪ tɹˈakt] (IPA) 
The lower respiratory tract is a vital part of the human respiratory system that includes the bronchioles, bronchi, and lungs. Though the term lower respiratory tract is widely used, there are several synonyms for it that offer more accurate or specific descriptions of its components. For instance, the alveolar region refers to the part of the lower respiratory tract composed of the alveoli, which are small air sacs within the lungs where gas exchange takes place. The respiratory tree is another synonym that describes the branching structure of the bronchi and bronchioles. Finally, the pulmonary system refers to the entire network of interconnected tubes and sacs that make up the lower respiratory tract and facilitate breathing.
