title: Morphology of the guinea pig respiratory tract.
abstract: A morphologic description of the airways of the guinea pig was developed from measurements of casts of the lungs and nasal cavity and from measurements of frozen sections of the lungs. The lengths, diameters, branching pattern, and numbers of elements of the respiratory tract formed the basis for a representative model of the system. The branching pattern is irregular to the pulmonary region but regularly dichotomous thereafter. The nasopharyngeal-tracheobronchial region contributes 2.64 cm3 of the total respiratory volume of 21.62 cm3. The alveoli contribute 16.31 cm3 of the 18.98 cm3 pulmonary region. The nasal region  consists of convoluted and irregular airways with a functional volume of 0.48 cm3.
mesh_terms: D000818:Animals; D001980:Bronchi / Q000033:anatomy & histology*; D004853:Epoxy Resins; D006168:Guinea Pigs; D008168:Lung / Q000033:anatomy & histology*; D008953:Models, Anatomic; D009296:Nasal Cavity / Q000033:anatomy & histology*; D009305:Nasopharynx / Q000033:anatomy & histology; D010256:Paranasal Sinuses / Q000033:anatomy & histology; D011650:Pulmonary Alveoli / Q000033:anatomy & histology*; D012126:Respiratory Dead Space; D014132:Trachea / Q000033:anatomy & histology
chemical_list: D004853:Epoxy Resins