Диафиз (Diaphysis)

Diaphysis is the central part (body) of a long (tubular) bone. The diaphysis is located between the two epiphyses and makes up the bulk of the length of the bone. It has the shape of a hollow cylindrical tube and contains a medullary cavity.

The outside of the diaphysis is covered with periosteum. Inside it is a spongy substance that forms the walls of the medullary cavity. The spongy substance is penetrated by bone beams, which give the diaphysis strength and resistance to compression and torsion.

Main functions of the diaphysis:

1. Ensuring the mechanical strength of the bone.

2. Bone marrow protection.

3. Participation in hematopoiesis (blood cells are formed in the bone marrow of the diaphysis).

4. Mineral depot.

Thus, the diaphysis is an important structural part of long bones, performing both supporting and hematopoietic functions.

The diaphysis is the central, most massive part of a long bone. Located between the epiphysis and metaphysis.

The diaphysis is the body of the bone (as opposed to the head and neck, which are its ends). On a cross section, the diaphysis has the shape of a cylinder.

At the ends, the diaphysis passes into the epiphysis and metaphysis. It has a spongy structure; cross sections show bone plates located parallel to each other.

In children and adolescents, the diaphysis is a site of active growth. It contains many blood vessels.

The diaphysis or diaphysis is the central and longest (proximal) part of a human long bone.

The diaphysis contains the medullary canal. Its transverse section (perpendicular to the axis of the bone) shows a clear three-layer bone structure: outer, spongy, and inner (cortical) layers. There is no bone tray in the diaphysis; instead there is a narrow, flattened lip