The main or mid section (shaft) of a long bone.
Shaft of a long bone, consisting of a hollow cylinder of compact bone that surrounds a medullary cavity.
The midsection or shaft of a long cylindrical bone, such as the femur.
The diaphysis, also referred to as the central portion or shaft of a long bone, such as the femur (thigh bone), plays a crucial role in the overall structure. During the intricate process of bone development, the diaphysis and the epiphysis (the end of the long bone) initially exist as separate entities, with a cartilaginous mass called the epiphyseal plate acting as the dividing barrier between them. However, as growth progresses, the diaphysis and epiphysis gradually merge and unite, culminating in the formation of a fully formed and integrated bone. This remarkable fusion process is vital for the proper growth and functioning of the skeletal system.