This particular blood vessel carries deoxygenated blood away from the heart to the lungs.

The pulmonary veins carry oxygenated blood back to the ___

After blood leaves the right atrium, it enters the ___.

After blood leaves the left atrium, it enters the ___.

Which part of the heart is the largest and strongest?

After the blood leaves the left ventricle is enters the

___ is a group of organs and tissues that act as transfer stations carrying needed materials to cells and removing their waste products.

The heart pumps blood around the body through a network of blood vessels that is over ___ miles

___ are tiny blood vessels that carry blood to an from almost all body cells and connect arteries and veins.

___ takes place when blood travels from the heart, through the lungs, and back to the heart.

___ takes place when oxygen-rich blood travels to all body tissues except the lungs.