Heart Blood Flow: A Simple Animation Guide

Welcome to our exploration of blood flow through the heart chambers!The heart is divided into four main chambers: two upper chambers called atria, and two lower chambers called ventricles.Let's identify each chamber. Here we have the right and left atria on top, and the right and left ventricles below.Deoxygenated blood from the body returns to the heart through two major veins: the superior vena cava from the upper body, and the inferior vena cava from the lower body.This deoxygenated blood flows into the right atrium.From the right atrium, blood passes through the tricuspid valve into the right ventricle.When the heart contracts, the blood is pushed through the pulmonary valve into the pulmonary arteries, which carry it to the lungs.Now that we understand how blood flows through the right side of the heart, let's see what happens next in the lungs.In the lungs, blood flows through a network of tiny capillaries surrounding the alveoli.Let's take a closer look at an alveolus, where the critical exchange of oxygen and carbon dioxide takes place.Oxygen from the air moves into the blood, while carbon dioxide from the blood is released into the air.As blood passes through the capillaries, it changes from deoxygenated to oxygen-rich blood.This newly oxygenated blood travels through the pulmonary veins back to the heart, entering the left atrium.The blood then passes through the mitral valve, which has two leaflets that help prevent backflow.The left ventricle has notably thicker walls than the right ventricle, as it needs to generate more force to pump blood throughout the entire body.When the left ventricle contracts, it pushes oxygen-rich blood through the aortic valve.The blood enters the aorta, the body's largest artery, which curves upward before branching to supply the entire body.From the aorta, oxygen-rich blood flows through a complex network of arteries.These arteries branch out to deliver oxygen and nutrients to every cell in the body, including the brain, muscles, and vital organs.After the cells use the oxygen, the now deoxygenated blood collects in veins to return to the heart.This process happens continuously, with your heart beating approximately one hundred thousand times every day.This remarkable system ensures that every cell in your body receives the oxygen and nutrients it needs to function.Thanks for learning about blood circulation with Spark.E!