What is the difference between diastolic and systolic?

What is the difference between diastolic and systolic?

Diastolic and systolic are the two numbers on a blood pressure reading. Every time your heart squeezes, it pumps out blood to the network of blood vessels known as the circulatory system. The force or pressure of that squeeze is called systolic blood pressure. When your heart rests between beats, the pressure in the arteries is the diastolic blood pressure. This is why your blood pressure has two numbers:

• The top number is the systolic blood pressure.
• The bottom number is the diastolic blood pressure.