The Phrenic Nerve Arises from the Left and Right Sides

question 24

Essay

The phrenic nerve arises from the left and right sides of cervical vertebra 3, 4 and 5. Describe the potential benefit of having the nerve exit from such a superior position and from multiple places on the spinal column.

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Definitions:

War on Terror

A global campaign launched by the United States after the September 11, 2001 terrorist attacks, aimed at eradicating terrorism primarily through military means.

Containment Theory

A strategic foreign policy concept aimed at preventing the spread of communism during the Cold War.

Department of State

A federal executive department responsible for the international relations of the United States, managing diplomacy, negotiating treaties, and protecting U.S. interests abroad.

National Security Council

A body within the executive branch of a government that advises the head of state on national security and foreign policy matters.