Name the four chambers of the heart and the major blood vessels leading in and out of the heart and

Four chambers: Right Atrium, left atrium, right ventricle, and left ventricle.

Major blood vessels: Superior and inferior venae cavae; pulmonary arteries and pulmonary veins; aorta.

How blood is pumped and circulated to and from the heart:
1. Deoxygenated blood flows into the right atrium from the superior and inferior venae cavae.
2. Blood moves from the right atrium into the right ventricle; from there it is pumped through the pulmonary arteries into the lungs.
3. Blood picks up oxygen and discards carbon dioxide in the lungs; it then goes through the pulmonary veins into the left atrium.
4. Oxygenated blood is forced from the left atrium into the left ventricle; from there it is pumped through the aorta into the rest of the body's blood vessels.

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