Here's a breakdown:

* Arteries: Carry oxygenated blood away from the heart to the tissues.

* Veins: Carry deoxygenated blood back to the heart from the tissues.

* Capillaries: Tiny blood vessels that connect arteries and veins and allow for the exchange of oxygen, nutrients, and waste products between the blood and the tissues.

The heart acts as a powerful pump that propels blood through the blood vessels, ensuring continuous delivery to all parts of the body.