Real human femur longitudinal section, medical specimen
This was another item that came as part of a collection from a medical college. As you can see, it is a human femur that has been sliced longitudinally, exposing the spongy tissue, medullary cavity etc.
This appears to be quite an old example and looks like it has had a lot of handling over the years as it has a nice deep colour. The collection number is also still written on it.
A nice example.