Answer: Your nervous system slows down your heart via a nerve called the vangus nerve.
Explanation:When you're resting or sleeping and you don't need a very fast heart rate, then the parasympathetic nervous system slows down your heart via a nerve called the vagus nerve.
When you're resting or sleeping and you don't need a very fast heart rate, then the parasympathetic nervous system slows down your heart via a nerve called the vagus nerve
