Structure of a Bird and a Mammal Bone, Specimen

Description Longitudinal and cross section of a prepared, real bird bone and mammal bone respectively, mounted on a base plate. The product illustrates the di?erence between the long bones of a bird and a mammal. Bird bones are hollow inside and have large air chambers. Mammal bones, in contrast, are flled with bone marrow and spongy tissue. Including display case for protection.