The internal structure is shown in all its detail. The direction of the blood flow is marked. 7 models, natural size and slightly enlarged. 1. Fish (Esox lucius), 2. Frog (Rana esculenta), 3. Tortoise (Emys orbicularis), 4. Crocodile (crocodylus niloticus), 5. Bird (Golden Eagle - Aquila chrysaetos), 6. Dog (Canis lupus familiaris) and 7. Human Being (Homo sapiens). Comprises 14 parts. Each model individually mounted on a stand with green base.