Science

1) Superior Vena Cava: It returns de oxygenated blood from head and arms to heart.

2) Pulmonary Veins: Carries oxygenated blood from lungs to heart.

3) Right atrium: Receives de-oxygenated blood

4) Tricuspid valve: Prevents back flow of blood to the right atrium.

5) Right ventricle: Pumps blood to lungs via pulmonary artery

6) Inferior vena cava: Returns de-oxygenated blood from lower limbs and organs to the heart

7) The cardiac muscle functions with the help of its cardiac cells. These cells are responsible for the contraction of this muscle and sending blood to the atria and ventricles. That in turn, reaches the blood vessels of the circulatory system.

8) Left ventricle: Pumps blood to all parts of the body except lungs via aorta.

9) Bicuspid valve (Mitral valve): Prevents back flow of blood to the left atrium.

10) Semi-lunar valve (Pulmonary valve): Prevent back flow of blood

11) Pulmonary vein: Carries oxygenated blood to the heart from the lungs.

12) Pulmonary artery: Carries de-oxygenated blood from the heart to the lungs.

13) Aorta: The biggest artery in the whole body. Carries oxygenated blood to rest of the body.