english: The white stuff is bone, and these red columns that you see and the yellow cells are cells that have arisen from one single skeletal stem cell -- columns of cartilage, columns of bone coming out of a single cell.
non_english: Ta belo je kost, in ti rdeči stebri, ki jih vidite in rumene celice so celice ki so nastale iz  ene same matične celice-- hrustanec in kosti  iz ene same celice.