Cardio vascular system

Feeling:

Really Dumb

Language:

English

Prompt:

Cardio vascular system
The cardiovascular system is like a big highway inside our body that helps move blood around. It includes the heart, blood vessels, and blood. The heart pumps blood to all parts of our body through blood vessels like roads. For example, when you run around and play, your heart beats faster to send more blood and oxygen to your muscles so you have energy. This is why exercise is important for keeping your cardiovascular system healthy. A verifiable fact is that the average adult heart beats about 72 times per minute, pumping about 2,000 gallons of blood every day!