Tags: Anatomical Structure, Embryology.
During Human embryogenesis the mandibular arch and hyoid arch grow more rapidly than those behind them with the result that the latter become to a certain extent telescoped within the former and a deep depression the cervical sinus is formed on either side of the neck.This sinus is bounded in front by the hyoid arch and behind by the thoracic wall; it is ultimately obliterated by the fusion of its walls.
