This project is a representation of the bone structure and development. The fetus represents an infant in the womb, whose bones are primarily composed of cartilage instead of the spongey bone matrix. Once the fetus is born, the bone turns into a true bone structure with the help from the osteoclasts and osteoblasts (blue and green blobs). The bone structure is like a brick wall, where layers are always being broken down and built back up. The bone is supplied by blood vessels and surrounded by nerves that run in and out of cavities within the bone.