Get to know the functions of your heart, blood vessels, and blood itself and how they work together to maintain your health.

You remember how Dorothy, Toto, and the rest of the gang were trying to make their way to see the Wizard of Oz? That’s kind of how veins work in relation to your heart. Your heart is the wizard, and ...

The circulatory system is your heart and blood vessels, and it’s essential to keeping your body functioning. This finely tuned system carries oxygen, nutrients, electrolytes, and hormones throughout ...