Heart Worksheets For Kids | Anatomy, Function, Health | Download PDF - Free Printable

Let's solve this heart labeling worksheet step by step. The image shows a diagram of the human heart with numbered parts, and we need to identify each part based on its location and function.

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Step-by-Step Analysis:

We’ll go through each number and identify the corresponding structure.

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#### 1.
Located at the top left, receiving deoxygenated blood from the body. This is the Superior Vena Cava.
✔ Answer: Superior Vena Cava

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#### 2.
On the top right, carrying oxygenated blood from the lungs to the heart. This is the Pulmonary Vein (there are four, but only one labeled).
✔ Answer: Pulmonary Vein

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#### 3.
Small vessels near the top right, branching off from the pulmonary veins. These are Pulmonary Arteries? Wait — no. Let’s check:

Actually, the pulmonary arteries carry deoxygenated blood *from* the heart *to* the lungs. But here, the arrows show blood going into the heart. So these must be Pulmonary Veins.

Wait — let's double-check:

- Pulmonary Veins → bring oxygenated blood from lungs to heart.
- Pulmonary Arteries → carry deoxygenated blood from heart to lungs.

But in the diagram:
- Number 2 has an arrow pointing into the heart → so it's bringing blood to the heart.
- Number 3 is also pointing into the heart → likely pulmonary veins?

Wait — there are two major veins coming from the lungs: pulmonary veins.

But number 3 appears to be smaller branches — perhaps pulmonary veins or pulmonary capillaries? But more likely, they're just pulmonary veins.

But wait — number 2 is already the main pulmonary vein. So maybe number 3 is pulmonary arteries?

No — look at the direction:

- Number 2: Arrow points into the heart → so it's pulmonary vein (bringing oxygenated blood).
- Number 3: Also points into the heart → same as 2 → so both are pulmonary veins.

But that can't be — there are two pulmonary veins per side.

Actually, number 3 might be pulmonary arteries, but they go out from the heart to the lungs.

Wait — the arrows on 3 are pointing into the heart? No — look closely:

In the diagram:
- Number 3 has arrows coming from the lungs into the heart → so it’s pulmonary veins.

But number 2 is also a large vessel going into the heart → so both 2 and 3 are pulmonary veins?

Wait — actually, number 2 is the left pulmonary vein, and number 3 is the right pulmonary vein? But they’re drawn differently.

Alternatively, number 3 might be pulmonary arteries — but they should go out of the heart.

Wait — let’s recheck the direction of flow.

Look at number 10 — it’s red, and goes out of the heart → that’s the aorta.

Now, number 2 is purple (deoxy) or pink (oxy)? It’s light purple → likely oxygenated blood → so pulmonary vein.

But number 3 is blue? No — in the diagram, 3 is light brown or tan — probably pulmonary arteries.

Wait — pulmonary arteries carry deoxygenated blood from the heart to the lungs.

So number 3 must be pulmonary arteries — but they are going out from the heart? But the arrow is pointing into the heart?

No — look carefully at the arrows.

- Number 3: The arrow is pointing into the heart? Or out?

In the diagram:
- Number 3 has small tubes with arrows pointing toward the heart → so blood is flowing into the heart → so it must be pulmonary veins.

But pulmonary veins carry oxygenated blood from lungs to heart → so yes.

But then number 2 is also going into the heart → so both 2 and 3 are pulmonary veins?

Wait — number 2 is a large vessel entering the left atrium, and number 3 is smaller, possibly pulmonary veins.

But standard labeling:

- Pulmonary Veins → 4 total (2 from each lung), enter left atrium
- Pulmonary Arteries → 2 (one to each lung), exit right ventricle

So:

- Number 2: Large vessel entering left atrium → Pulmonary Vein ✔
- Number 3: Smaller vessels entering left atrium → also Pulmonary Veins? But typically labeled as such.

But in many diagrams, number 3 is the pulmonary arteries — but they go out.

Wait — look at the color:
- Blue = deoxygenated blood
- Red/Pink = oxygenated

So:
- Number 1: Blue → deoxygenated → Superior Vena Cava
- Number 13: Blue → Inferior Vena Cava
- Number 2: Pink → oxygenated → Pulmonary Vein
- Number 3: Tan/brown → could be pulmonary arteries? But they carry deoxygenated blood → so should be blue?

Wait — in some diagrams, pulmonary arteries are shown in purple or blue, but here they are tan.

But number 3 has arrows pointing into the heart → so if it’s going into the heart, it can’t be pulmonary artery.

This suggests number 3 is pulmonary veins.

But that would mean both 2 and 3 are pulmonary veins.

But number 2 is clearly the main pulmonary vein (large tube), and number 3 might be branches.

Alternatively, number 3 might be pulmonary arteries, but the arrows are pointing into the heart → which is wrong.

Wait — look again at the arrows.

In the diagram:
- Number 3: Arrows are pointing away from the heart → so blood is leaving the heart → so it’s pulmonary arteries

Ah! That’s the key!

Let me re-express:

- Number 3: Arrows pointing away from the heart → so blood is leaving → pulmonary arteries → carry deoxygenated blood to lungs → so correct

So:
- Number 3: Pulmonary Arteries

But earlier I thought they were pointing into the heart — but no, the arrows are outward.

Yes — the small tubes from the heart to the lungs have arrows away from the heart → so pulmonary arteries

Similarly:
- Number 2: Arrows into the heart → pulmonary veins

So now:

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Final Identification:

Let’s go number by number.

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#### 1.
Large blue vessel entering top of right atrium → Superior Vena Cava
✔ Answer: Superior Vena Cava

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#### 2.
Large pink vessel entering left atrium → Pulmonary Vein
✔ Answer: Pulmonary Vein

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#### 3.
Small vessels going from heart to lungs, arrows outward → Pulmonary Arteries
✔ Answer: Pulmonary Arteries

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#### 4.
Inside the heart, connecting left atrium to left ventricle → Mitral Valve (Bicuspid Valve)
✔ Answer: Mitral Valve

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#### 5.
Valve between right atrium and right ventricle → Tricuspid Valve
✔ Answer: Tricuspid Valve

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#### 6.
Muscular chamber on the left side, pumps blood to the body → Left Ventricle
✔ Answer: Left Ventricle

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#### 7.
Muscular chamber on the right side, pumps blood to lungs → Right Ventricle
✔ Answer: Right Ventricle

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#### 8.
Structure above the mitral valve, in the left atrium → Left Atrium
✔ Answer: Left Atrium

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#### 9.
Structure above the tricuspid valve, in the right atrium → Right Atrium
✔ Answer: Right Atrium

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#### 10.
Large red vessel exiting left ventricle → Aorta
✔ Answer: Aorta

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#### 11.
Valve at the base of the aorta → Aortic Valve
✔ Answer: Aortic Valve

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#### 12.
Valve at the base of the pulmonary artery → Pulmonary Valve
✔ Answer: Pulmonary Valve

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#### 13.
Large blue vessel entering bottom of right atrium → Inferior Vena Cava
✔ Answer: Inferior Vena Cava

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✔ Final Answer Key:

| Number | Structure |
|--------|-----------------------|
| 1 | Superior Vena Cava |
| 2 | Pulmonary Vein |
| 3 | Pulmonary Arteries |
| 4 | Mitral Valve |
| 5 | Tricuspid Valve |
| 6 | Left Ventricle |
| 7 | Right Ventricle |
| 8 | Left Atrium |
| 9 | Right Atrium |
| 10 | Aorta |
| 11 | Aortic Valve |
| 12 | Pulmonary Valve |
| 13 | Inferior Vena Cava |

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🔍 Explanation of Key Structures:

- Vena Cavae: Bring deoxygenated blood from body to right atrium.
- Pulmonary Arteries: Carry deoxygenated blood from right ventricle to lungs.
- Pulmonary Veins: Bring oxygenated blood from lungs to left atrium.
- Aorta: Largest artery; carries oxygenated blood from left ventricle to body.
- Atria: Upper chambers that receive blood.
- Ventricles: Lower chambers that pump blood.
- Valves: Prevent backflow of blood.
- Tricuspid: Between right atrium and ventricle.
- Pulmonary: Between right ventricle and pulmonary artery.
- Mitral (Bicuspid): Between left atrium and ventricle.
- Aortic: Between left ventricle and aorta.

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✔ Summary:

The heart has four chambers and four valves, working together to circulate blood. Deoxygenated blood enters via vena cavae → right atrium → right ventricle → lungs via pulmonary arteries. Oxygenated blood returns via pulmonary veins → left atrium → left ventricle → body via aorta.

This labeling helps understand the flow of blood and the role of each structure.

Let me know if you'd like a printable version or a diagram explanation!