III. Physiology: Ossification Centers in order of appearance on XRay (Mnemonic: CRITOE)
- Capitellum- Girls: 1 year
- Boys: 2 years
 
- Radial Head- Girls: 3 year
- Boys: 4 years
 
- Internal or medial epicondyle- Girls: 5 year
- Boys: 6 years
 
- Trochlea- Girls: 7 year
- Boys: 8 years
 
- Olecranon- Girls: 9 year
- Boys: 10 years
 
- External or lateral epicondyle- Girls: 11 year
- Boys: 12 years
 
IV. Resources
- Dr. Yamamoto, Pediatrics, University of Hawaii
 
          