External Anatomy of the Heart- Anterior View. The Virtual Body - MEDtropolis. PIG HEART!!!!!!! What happens during a Heart Attack? The Heart and Circulation. The Blood Typing Game. The virtual heart human heart spiral waves ventricular fibrillation atrial fibrillation ventrciular tachycardia java excitable media movies excitable media Fitzhug nagumo beeler reuter luo rudy model mathematical cell modeling simulation numerical. Heart Contraction and Blood Flow - NHLBI, NIH. The animation below shows how your heart pumps blood. Click the "start" button to play the animation. Written and spoken explanations are provided with each frame.
Use the buttons in the lower right corner to pause, restart, or replay the animation, or use the scroll bar below the buttons to move through the frames. The animation shows how blood flows through the heart as it contracts and relaxes. Heartbeat Almost everyone has heard the real or recorded sound of a heartbeat. A heartbeat may seem like a simple, repeated event. Each side of your heart uses an inlet valve to help move blood between the atrium and ventricle.
Each of your heart's ventricles also has an outlet valve. Each heartbeat has two basic parts: diastole (di-AS-toe-lee) and systole (SIS-toe-lee). During diastole, the atria and ventricles of your heart relax and begin to fill with blood. The atria then begin to relax. Pumping Action Your heart uses its four valves to ensure your blood flows in only one direction. Shockwave.