It starts from the pituitary body and continues its downward path along the nerves of the esophagus and digestive tract, then, if not lost, ascends along the spine to the head.
Iqala kusuka emzimbeni we-pituitary futhi iqhubeke nendlela yayo yokwehla ngomthambo we-esophagus kanye ne-digestive tract, uma-ke ingalahleki, inyukela ngomgogodla iye ekhanda.