This is a 3d model of a bronchiole branching into alveoli. Each alveoli is surrounded by a capillary network. The model contains grouping for the smooth muscle, the alveoli, and the capillary vessels. It also comes with a texture map for the vessels.
Zygote's Solid 3D Anatomy has set the standard in CAD and Simulation for over a decade.
"There are very few places to find high-quality, realistic models of human anatomy that are clean enough to adapt for use within interactive simulations. The Zygote collection has proven a truly valuable source of content for many aspects of our products."
Kurt Miller / Senior Software Engineer - Medical Simulation Corporation