Dr Craig Hacking and Dr Jeremy Jones et al.

The diaphysis (pl: diaphyses) is the main portion (shaft) of a long bone (a bone that is longer than it is wide). 

The diaphysis has a tubular composition with a hard outer section of hard cortical bone and central portion with cancellous bone and bone marrow cavity.

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

See also

Share article

Article information

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

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Figure 1: diagram of bone
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.