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. 

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.

It is formed by endochondral ossification before longitudinal growth continues with secondary ossification at the physis.

See also

Terms used in radiology

Article information

rID: 42632
Section: Anatomy
Tag: bone
Synonyms or Alternate Spellings:
  • Diaphyses
  • Shaft

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Cases and figures

  • Figure 1: diagram of bone
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