<prompt> Lower end of humerus ossifies from how many secondary ossification centers1246  <response>: Ans. is c i.e., 4The humerus ossifies from one primary center and 7 secondary centersThe upper end ossifies from 3 secondary centers head 1 yearagreater tubercle 2 yearalesser tubercle 5th year.The lower end ossifies from 4 secondary centers which form 2 epiphyses.The center fouh center for medial epicondyle appears at 4-6 years, forms a separate epiphysis and fuses with shaft during 20th year. 