Human Respiratory System Anatomy - Lungs and Bronchial Tree Diagram #3301121 (License: Personal Use)

This black-and-white engraved illustration depicts the human respiratory system, with labeled structures including the larynx (1), cricoid cartilage (2), and trachea (3). The bilateral lungs show progressively finer divisions of the bronchial tree, illustrating how air travels from the trachea into bronchi, bronchioles, and alveolar sacs. The diaphragm is shaded at the base, emphasizing thoracic cavity boundaries.

Used in medical textbooks, anatomy courses, and health education websites to teach respiratory physiology; targets students, educators, and healthcare professionals seeking foundational knowledge of lung structure.