Trachea (100x), demonstrating respiratory epithelium and supporting cartilage.

Bronchus, 100x, demonstrating bronchial glands, supporting cartilage

Bronchus, 200x, demonstrating bronchial glands, respiratory epithelium and supporting cartilage

Terminal and respiratory bronchioles (200x) from human lung.

Alveoli (human lung), 400x, demonstrating Type I pneumocytes (squamous alveolar cells) and Type II pneumocytes (also termed irregularly shaped cuboidal cells) and pulmonary macrophages (also termed dust cells)