Inside the diaphysis is the medullary cavity, which is filled with yellow bone marrow in an Learn more. It's a middle tubular part composed of compact bone which surrounds a central marrow cavity which contains red or yellow marrow. A long bone has two main regions: the diaphysis and the epiphysis (Figure 6.3.1). The diaphyses (singular: diaphysis), sometimes colloquially called the shafts, are the main portions of a long bone (a bone that is longer than it is wide) and provide most of their length.. In general, long bones are composed of two distinct parts: the cortex or cortical bone, and the bone marrow . Diaphysis composition . The cortex represents the exterior of the bone and is covered by the periosteum, while the medulla occupies the interior of the bone, with … For mechanical reasons, and because there is a poorer blood… History and Etymology for diaphysis. Definition of diaphysis in the Definitions.net dictionary. While as a child you have about 300 bones in your body, as you grow into an adult, these bones fuse until you're left with 206 bones running underneath your skin and protecting your vital organs. The main difference between epiphysis and diaphysis is that epiphysis is the rounded end of a long bone, at its joint with adjacent bone(s), whereas diaphysis is the main or midsection (shaft) of a long bone.Furthermore, epiphysis is made up of spongy bone while diaphysis is made up of cortical bone.. Epiphysis, metaphysis, and diaphysis are three different parts of a long bone. The diaphysis is the main or midsection (shaft) of a long bone. Anatomy: The Parts of Bones. What does diaphysis mean? Sometimes the bone marrow of the diaphysis is primarily involved, and in osteomyelitis it is usually the compact (cortical) bone of the shaft that undergoes necrosis. There's no bones about it. In diaphysis, primary ossification occurs. Information and translations of diaphysis in the most comprehensive dictionary definitions resource on the web. diaphysis meaning: 1. the main section of a long bone: 2. the main section of a long bone: . (2004, July 22). Other articles where Diaphysis is discussed: bone disease: Deficient blood supply to bone: …may involve the shaft (diaphysis) or the ends (epiphyses) of the long bones. It is made up of cortical bone and usually contains bone marrow and adipose tissue (fat). adj., adj metaphys´eal. ‘The tumor is eccentric, usually metaphyseal, but it may extend into the epiphysis or along the medullary cavity into the diaphysis.’ ‘The forces of the two opposing groups of muscles result in twisting of the epiphysis and the diaphysis in opposite directions.’ The diaphysis is the main or mid section (shaft) of a long bone.It is made up of cortical bone and usually contains bone marrow and adipose tissue (fat).. The diaphysis has a tubular composition with a hard outer section of hard cortical bone and a central portion with cancellous bone and bone marrow cavity.. This definition incorporates text from the wikipedia website - Wikipedia: The free encyclopedia. Meaning of diaphysis. The diaphysis is the hollow, tubular shaft that runs between the proximal and distal ends of the bone. Diaphysis definition is - the shaft of a long bone. Gross Anatomy of Bones. New Latin, from Greek, spinous process of the tibia, from diaphyesthai to grow between, from dia-+ … Bones have four main parts: the diaphysis… the wider part at the end of the shaft of a long bone, adjacent to the epiphyseal disk.