Parasympathetic nervous system

The parasympathetic nervous system is like your body's brake system. When you're feeling calm and relaxed, this part of your nervous system helps slow down your heart rate, lower your blood pressure, and relax your muscles.

Think of it like when you're driving a car and you want to slow down. You press on the brake pedal and the car stops. In the same way, when your body needs to slow down and rest, the parasympathetic nervous system kicks in and helps you relax.

This system is also responsible for things like helping you digest your food and promoting sleep. So it's like a cozy blanket that helps you wind down after a long day.