From where the given structures originate?

From where the given structures originate?
(i) Axon (ii) Osteocytes
(iii) Chondroblasts (iv) Tendons

(i) Axon It is a very long fibre that develops from the cyton of a single neuron.
(ii) Osteocytes These are the bone cells that occurs entrapped inside the matrix.
(iii) Chondroblasts These are the special resident cells of the skeletal connective tissue.
(iv) Tendons These are white fibrous cords, which connect muscles to hones.