part of part of develops from develops from has potential to develop into has potential to develop into radius bone mesenchyme of forearm pre-cartilage condensation radius-ulna pre-cartilage condensation radius pre-cartilage condensation EHDAA2:0001586 A pre-cartilage condensation that has the potential to develop into a radius bone. still to decide whether this is a distinct pre-cartilage condensation UBERON:0010846 radius endochondral element