Human Heart Diagram Without Labels - Labelling Worksheet - Free Printable

The task is to label the parts of the human heart system using the provided word bank. Let’s go step by step.

First, we need to understand the basic structure of the heart and how blood flows through it. The heart has four main chambers: right atrium, right ventricle, left atrium, and left ventricle. Blood enters the right side of the heart from the body (via the superior and inferior vena cava), gets pumped to the lungs (via the pulmonary artery), returns oxygenated from the lungs (via the pulmonary veins) to the left side, and then gets pumped out to the body (via the aorta).

Now, let’s match each line in the diagram to the correct term from the list:

1. Topmost line on the left → points to the large vein bringing deoxygenated blood from the upper body → superior vena cava
2. Second line on the left → points to the chamber receiving that blood → right atrium
3. Third line on the left → points to the lower chamber on the right side → right ventricle
4. Fourth line on the left → points to the vessel going to the lungs → pulmonary artery
5. Fifth line on the left → points to the vessel returning oxygenated blood from the lungs → pulmonary veins
6. Sixth line on the left → points to the chamber receiving oxygenated blood → left atrium
7. Seventh line on the left → points to the main pumping chamber on the left → left ventricle
8. Eighth line on the left → points to the large artery carrying blood to the body → aorta

On the right side of the diagram:

9. Topmost line on the right → points to the same large artery as above → aorta
10. Second line on the right → points to the vessel going to the lungs → pulmonary artery
11. Third line on the right → points to the vessel returning from lungs → pulmonary veins
12. Fourth line on the right → points to the chamber receiving oxygenated blood → left atrium
13. Fifth line on the right → points to the main pumping chamber → left ventricle
14. Bottom line on the right → points to the large vein from lower body → inferior vena cava

Also, note: the word bank includes “pulmonary valve” — this is likely between the right ventricle and pulmonary artery, and also between the left ventricle and aorta. But since the diagram doesn’t have lines pointing directly to valves, we’ll focus on the labeled structures.

Let’s double-check with standard anatomy:

- Superior vena cava → top right vein
- Inferior vena cava → bottom right vein
- Right atrium → receives blood from both venae cavae
- Right ventricle → pumps to lungs via pulmonary artery
- Pulmonary artery → carries deoxygenated blood to lungs
- Pulmonary veins → carry oxygenated blood back to left atrium
- Left atrium → receives oxygenated blood
- Left ventricle → pumps to body via aorta
- Aorta → largest artery, carries oxygenated blood to body

All matches are consistent.

Final Answer:
Left side (top to bottom):
1. superior vena cava
2. right atrium
3. right ventricle
4. pulmonary artery
5. pulmonary veins
6. left atrium
7. left ventricle
8. aorta

Right side (top to bottom):
9. aorta
10. pulmonary artery
11. pulmonary veins
12. left atrium
13. left ventricle
14. inferior vena cava