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When President John F. Kennedy was hit by a sniper's bullet in the back of his head, he died almost instantly because the bullet destroyed the part of his brain called the _____, which controls breathing, heartbeat, and other vital body functions

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The correct answer is Medulla

The medulla (or ablongata medulla) is the organ that is in direct contact with the spinal cord, it is a pathway of nerves to the organs located above.

In the medulla, cell bodies of neurons are located that control vital functions, such as heartbeat, respiratory rate and blood pressure. It also contains cell bodies of neurons related to the control of swallowing, coughing and vomiting.

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