👉 Murens or murein are a type of bone that is not normally found in the body and instead develops from the remains of an early human ancestor. They are composed mostly of calcium carbonate, which can be used as a source of calcium for the developing bones. The term "mureins" comes from the Latin word "murens," meaning "bone." These bones are usually found in the pelvis or at the end of the femur (knee bone), and they
