A type of bone characterized by its long and cylindrical shape is known as a long bone. Long bones, such as those found in the arms and legs, play crucial roles in supporting the weight of the body and facilitating movement by acting as levers. They consist of a diaphysis (shaft) and epiphyses (ends), contain bone marrow, and are vital for producing blood cells and storing minerals. Their structure allows for strength and flexibility, accommodating various physical activities.