<prompt> Bones ossified at bihUpper end of humerusLower end of humerusLower end of femurLower end of tibia  <response>: Secondary centers around knee joint distal femur and proximal tibia appear during last weeks of intrauterine life or immediately after bih Primary center of all tarsal bones except talus, calcaneus and cuboid appear after bih Ref: Grays39ep185-210 