Well labeled diagram of human heart.

Human heart is a major organ because it is responsible for pumping blood throughout the body, delivering oxygen and nutrients to tissues while removing waste products. Without its continuous function, cells would not receive the necessary substances to sustain life, leading to organ failure and death.

To help you remember the parts of the heart quickly and effectively, we suggest practicing with an interactive labeled diagram. These diagrams allow you to visualize the heart’s structure and test your knowledge through interactive features such as labeling exercises, quizzes, and animations.

Here are the major parts of human heart.

1. Right Atrium: The upper right chamber of the heart that receives deoxygenated blood from the body through the superior and inferior vena cava.
2. Left Atrium: The upper left chamber of the heart that receives oxygenated blood from the lungs through the pulmonary veins.
3. Right Ventricle: The lower right chamber of the heart that pumps deoxygenated blood to the lungs through the pulmonary artery.
4. Left Ventricle: The lower left chamber of the heart that pumps oxygenated blood to the rest of the body through the aorta. It has the thickest walls to handle the high pressure needed to pump blood throughout the body.
5. Tricuspid Valve: The valve located between the right atrium and right ventricle that prevents backflow of blood when the ventricle contracts.
6. Mitral Valve: Also known as the bicuspid valve, it is located between the left atrium and left ventricle and prevents backflow when the ventricle contracts.
7. Pulmonary Valve: The valve located between the right ventricle and the pulmonary artery that prevents backflow of blood into the ventricle after it contracts.
8. Aortic Valve: The valve located between the left ventricle and the aorta that prevents backflow of blood into the ventricle after it contracts.
9. Aorta: The largest artery in the body that carries oxygenated blood from the left ventricle to the rest of the body.
10. Pulmonary Artery: The artery that carries deoxygenated blood from the right ventricle to the lungs for oxygenation.
11. Pulmonary Veins: The veins that carry oxygenated blood from the lungs to the left atrium.
12. Superior Vena Cava: A large vein that carries deoxygenated blood from the upper body to the right atrium.
13. Inferior Vena Cava: A large vein that carries deoxygenated blood from the lower body to the right atrium.
14. Septum: The muscular wall that divides the left and right sides of the heart, preventing the mixing of oxygenated and deoxygenated blood.

Each of these parts plays a crucial role in the heart’s function of pumping blood throughout the body, ensuring that tissues receive enough oxygen and nutrients while removing waste products like carbon dioxide.