trachea e. tertiary bronchusWhat is the main structure of all regions of the respiratory system?Which of the following does not contain cartilaginous rings? a. Trachea b. Primary bronchi c. Secondary bronchi d. Distal bronchioles e. All of the aboveWhat...
The ___ cells are believed to be the primary source of pulmonary surfactant. Alveoli: The alveoli of the lungs are the locations where oxygen gas from the air is exchanged with carbon dioxide from the blood. The epithelium of the alveoli consists of two types of cel...