<prompt> Apex of lungs at what level of cervical veebra?C4C5C6C7  <response>: The apex apex pulmonis is rounded, and extends into the root of the neck, reaching from 2.5 to 4 cm. above the level of the sternal end of the first rib. A sulcus produced by the subclan aery as it curves in front of the pleura runs upward and lateralward immediately below the apex. Ref: Anatomy of the Human Body Henry Gray. 