The Heart
Circulation of blood through the chambers of the heart. Deoxygenated blood is received from the systemic circulation into the right atrium, it is pumped into the right ventricle and then through the pulmonary artery into the lungs. Through association with the alveoli the blood is oxygenated in the lungs and returns to the left atrium through the pulmonary veins, before passing into the left ventricle and being pumped around the body.
This diagram of the heart indicates the superior vena cava, aorta, pulmonary artery, pulmonary vein, mitral valve, aortal valve, left and right atria, left and right ventricle, inferior vena cava, tricuspid valve, and pulmonary valve.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Diagram of the human heart (cropped)."
http://commons.wikimedia.org/wiki/File:Diagram_of_the_human_heart_(cropped).svg
Wikimedia
CC BY-SA 3.0.
.svg){kind=link}