This life-size model is finely colored to show all major details of the respiratory organs: diaphragm with muscles, tendons, and major openings for vessels and esophagus, bisected heart shows the origins of 5 abdominal arteries, as well as all internal structures, 3 thoracic and 3 lumbar vertebrae, sectioned left lung shows bronchioles, pulmonary arteries and veins, and the larynx, sectioned to show its structure. On a base with key. Size: 16" x 9" x 7-1/2".