1. Various parts of the heart with their respective functions are indicated in the diagram. They are:

1. Aorta: Carries oxygen-rich blood from the left ventricle to the body.
2. Right Pulmonary Veins: Bring oxygen-rich blood from the right lung to the left atrium.
3. Right atrium: Accepts oxygen-poor blood from the body.
4. Right ventricle: Pumps oxygen-poor blood to the lungs.
5. Tricuspid Valve
6. Inferior Vena Cava Brings oxygen-poor blood from the lower body to the right atrium.
7. Pulmonary Arteries Carry oxygen-poor blood to the lungs.
8. Left atrium: Accepts oxygen-rich blood from the lungs.
9. Left Pulmonary Veins Bring oxygen-rich blood from the left lung to the left atrium.
10. Mitral Valve
11. Pulmonary Valve
12. Aortic Valve
13. Left ventricle: Pumps oxygen-rich blood to the body.
14. Septum

2. The arrows show the direction of flow of blood through the arteries and ventricles in the heart.