Heart and cardiac structures
The heart is a four-chambered muscular pump. The right side sends blood to the lungs, and the left side sends oxygenated blood to the rest of the body. Valves keep blood moving in one direction.
The atlas models this system as interactive 3D geometry (toggle it in the Systems panel).
Open the 3D atlasStructures
Common questions
How many chambers does the heart have?
Four: the right and left atria receive blood, and the right and left ventricles pump it out.