We've learned that oxygenated blood goes from the pulmonary veins to the left atrium which is part of the heart.
The left atrium sends the blood into a large area of the heart called the left ventricle.
The left ventricle takes in all of the fresh blood full of oxygen, and pushes it all the way out to every part of your body.
From the tips of your toes to your fingers and ears, the blood carrying the oxygen that your body needs is pumped out by the muscles of the left ventricle.
(from: wikipedia - ventricle (heart))
Kid Facts - Blast from the past: Procerus Nose Muscle
