Human Respiratory and Circulatory System Anatomy Diagram #3301112 (License: Personal Use)

This vintage-style anatomical illustration reveals the bilateral lungs with branching bronchial trees, the centrally positioned heart with major vessels, and the trachea extending from the larynx. The cross-hatched shading adds depth and texture, emphasizing organ structure without color distraction. It serves as an educational tool for understanding thoracic anatomy in physiology and medicine.

Commonly used in medical textbooks, health education websites, biology courses, and patient information materials to illustrate core cardiopulmonary anatomy; matches user intent for learning or teaching human body systems.