Which one of the following structures is not enclosed by the carotid sheath?
The cervical sympathetic chain lies behind the carotid sheath,plastered to the preveebral fascia. The contents of carotid sheath are common or internal carotid aeries,internal jugular vein and the vagus nerve. Notes:In the upper pa of sheath there are IX,XI,XII nerves also . These nerves pierce along with the external carotid aery. REF.BDC VOL.3,sixth edition pg 85
Internal jugular vein
Carotid aery
Vagus nerve
Cervical sympathetic chain
Head and neck