Explain how structure x a young axolotl survive as it grows

Axolotl is a Mexican salamander or Abystoma Mexicanum.  It can survive as it grows through True Cellular Regeneration.  This  is the ability to regenerate cells, tissues and organs without the need of transplants.  The axolotl is unique in the sense that it can renew several structures like limbs, jaws, tail, spinal cord, skin throughout their lives. They can even receive transplanted organs from other individuals and accept them without difficulty.