Cervical sinus
Template:Infobox Embryology Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
The mandibular and hyoid arches 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.
Additional images
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The head and neck of a human embryo thirty-two days old, seen from the ventral surface.
