Arteries carry oxygen-rich blood away from your heart, and veins carry oxygen-poor blood back to

The one-way vascular system carries blood to all parts of your body. This process of

Blood is carried from your heart to the rest of your body through a complex

The one-way vascular system carries blood to all parts of your body. This process of

A heartbeat is a two-part pumping action that takes about a second A heartbeat is

Your heart is located between your lungs in the middle of your chest, behind and

Your heart is located between your lungs in the middle of your chest, behind and

The fetus does not use its own lungs until birth, so its circulatory system is

Coronary Circulation The heart muscle, like every other organ or tissue in your body, needs

Electrical impulses from your heart muscle (the myocardium) cause your heart to beat (contract). This