The lymphatic system is an integral part of the immune system and it plays an important part in the body to defense against diseases. The model is designed with input from medical and educational professionals and custom molded using the highest quality nontoxic polymers and polyvinyl chloride (PVC) for durability. It is hand-painted by skilled artists to deliver the highest level of detail possible using vibrant, safe paint. Includes a key card identifying 9 labeled structures. Size on base: 18″L x 8″W x 1.7″H.