How Your Heart Pumps Blood
உங்கள் இதயம் இரத்தத்தை எப்படிச் செலுத்துகிறது?
Your heart is a muscle that never takes a break. Here is how its four chambers and valves keep blood moving around your body.
Human Body
மனித உடல்
A tour of the heart, the brain and the amazing systems that keep us alive.