Apex of lungs at what level of cervical veebra?: (A) C4, (B) C5, (C) C6, (D) C7
Answer is D. 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.