[Opening Scene: Whiteboard with a drawing of a heart]Voiceover: Welcome to our whiteboard animation on the function of the heart in the human body.[Animation: Drawing of a heart beating]Voiceover: The heart is a vital organ that pumps blood throughout the body, delivering oxygen and nutrients to the cells and removing waste products.[Animation: Arrows indicating blood flow from the heart to the body and back]Voiceover: Let's take a closer look at how the heart accomplishes this important task.[Scene transition: Drawing of the heart with labeled chambers]Voiceover: The heart has four chambers: two atria at the top and two ventricles at the bottom.[Animation: Arrows showing blood flow from the body into the right atrium]Voiceover: Deoxygenated blood returns to the heart from the body through the superior and inferior vena cava and enters the right atrium.[Animation: Arrows showing blood flowing from the right atrium into the right ventricle]Voiceover: From the right atrium, the blood flows into the right ventricle.[Animation: Arrows indicating blood flow from the right ventricle to the lungs]Voiceover: The right ventricle pumps the blood to the lungs, where it picks up oxygen and releases carbon dioxide.[Animation: Arrows showing oxygenated blood returning from the lungs to the left atrium]Voiceover: Oxygenated blood returns from the lungs to the heart and enters the left atrium.[Animation: Arrows showing blood flowing from the left atrium into the left ventricle]Voiceover: From the left atrium, the blood flows into the left ventricle.[Animation: Arrows indicating blood flow from the left ventricle to the body]Voiceover: The left ventricle pumps the oxygen-rich blood out to the body through the aorta, delivering oxygen and nutrients to the cells.[Animation: Arrows showing deoxygenated blood returning to the heart]Voiceover: And the process repeats, with deoxygenated blood returning to the heart to be pumped to the lungs for oxygenation.[Closing Scene: Drawing of a healthy heart with the words The Amazing Heart above it]Voiceover: And that's the incredible function of the heart in the human body. Remember to take care of your heart, as it works tirelessly to keep you alive and well.