<prompt> The costal cailages of these ribs do not reach the sternum11th 12th1st 2nd6th 7th8th, 9th 10th  <response>: 8,9,10 the ribs are joined to the next higher cailage B D CHOURASIAS HUMAN ANATOMY UPPER LIMB THORAX VOLUME, 1 SIXTH EDITION, Page no, 196 