Muscles and blood flow work together to help us move around and stay active. When our muscles tighten up, they need energy. This energy comes from oxygen-rich blood pumped by our heart.

How They Work Together:

• More Blood Flow: When we exercise, our heart beats faster. This helps send more blood to the muscles that are working hard.
• Bringing in Nutrients: The blood carries oxygen and sugar (glucose) to the muscles. These are used to create energy in the form of ATP, which is what our muscles need to keep going.
• Getting Rid of Waste: The blood also helps take away waste products like carbon dioxide and lactic acid, which can build up when we exercise.

Example:

Think about when you go for a run. As you run faster, your heart pumps harder, sending more blood to your leg muscles. This helps them work better and last longer. This teamwork between your muscles and blood helps you keep moving without getting too tired.