The dog is the most companionate animal in human history. The relationship between dogs and humans started over 15,000 years ago, when humans began to intentionally breed dogs and domesticate them. The 4D Vision Golden Retriever Anatomy Model is an educational science model with 30 fully detachable organs and body parts. The model has a transparent cutaway to show internal structures. Details: Golden retriever anatomy 32 pieces For ages 8 and up Contents: 30 fully detachable organs and body parts Display platform Illustrated guidebook