The Heart Diagram | Labeled and Unlabeled Worksheets | Heart Study ... - Free Printable

Let’s go step by step to label the heart diagram correctly.

We are given a hand-drawn heart with numbers 1 through 11, and some parts already labeled in red. Our job is to match each number to the correct anatomical structure based on standard heart anatomy.

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Step 1: Look at what’s already labeled

- “Superior vena cava” points to #10 → so #10 = Superior vena cava
- “Inferior vena cava” points to #11 → so #11 = Inferior vena cava
- “Right atrium” points to #2 → so #2 = Right atrium
- “Right ventricle” points to #3 → so #3 = Right ventricle
- “Left ventricle” points to #9 → so #9 = Left ventricle
- “Left atrium” points to #8 → so #8 = Left atrium
- “Pulmonary artery” points to #6 → so #6 = Pulmonary artery
- “Aorta (aortic arch)” points to #1 → so #1 = Aorta
- “Pulmonary veins” point to #7 → so #7 = Pulmonary veins
- “Tricuspid valve” points to #4 → so #4 = Tricuspid valve
- “Mitral valve” points to #5? Wait — let’s check.

Wait — look again:

The label “Mitral valve” has a line pointing to the valve between left atrium (#8) and left ventricle (#9). That should be #5? But #5 is drawn near the pulmonary semilunar valve?

Actually, looking carefully:

- The label “Pulmonary (semi-lunar) valve” points to #5 → so #5 = Pulmonary semilunar valve
- Then where is the mitral valve? The label “Mitral valve” points to the valve between #8 (left atrium) and #9 (left ventricle). In the drawing, that’s likely the same as the bicuspid valve — but it’s not numbered directly? Wait — actually, in the diagram, the number 5 is placed near the pulmonary valve, and the mitral valve is unlabeled with a number? No — wait, let’s re-express.

Actually, looking at the image description:

Number 5 is pointing to the pulmonary semilunar valve (as labeled).

Number 4 is tricuspid valve.

Then what about the mitral valve? It’s labeled in red, but which number does it correspond to? Actually, in the diagram, the mitral valve is between left atrium and left ventricle — and there’s no number directly on it? Wait — perhaps I misread.

Wait — let’s list all numbers and assign them logically:

Standard blood flow:

Deoxygenated blood enters right atrium (#2) via superior (#10) and inferior (#11) vena cava.

Goes through tricuspid valve (#4) to right ventricle (#3).

Then pumped through pulmonary semilunar valve (#5) into pulmonary artery (#6) → to lungs.

Oxygenated blood returns via pulmonary veins (#7) to left atrium (#8).

Goes through mitral (bicuspid) valve → to left ventricle (#9).

Then pumped through aortic semilunar valve → into aorta (#1).

So now, we need to find which number corresponds to the mitral valve.

Looking back at the original image description:

There is a label “Mitral valve” with a line pointing to the valve between left atrium and left ventricle. In the drawing, that valve is located near number... actually, in many diagrams, the mitral valve isn’t always numbered separately if the focus is on chambers and major vessels. But here, since all structures are meant to be labeled, and we have 11 numbers, let’s count:

Numbers used: 1,2,3,4,5,6,7,8,9,10,11 → 11 total.

Assigned so far:

#1 – Aorta
#2 – Right atrium
#3 – Right ventricle
#4 – Tricuspid valve
#5 – Pulmonary semilunar valve
#6 – Pulmonary artery
#7 – Pulmonary veins
#8 – Left atrium
#9 – Left ventricle
#10 – Superior vena cava
#11 – Inferior vena cava

That’s all 11! So where is the mitral valve? Ah — in this diagram, the mitral valve is NOT assigned a separate number. The label “Mitral valve” is present, but it doesn’t point to a numbered part — or maybe it’s implied to be part of the path from #8 to #9, but no number is on the valve itself.

Wait — looking again at the user’s image description:

It says: “Mitral valve” with a line pointing to... actually, in the text you provided, it says:

> Mitral valve — [line] — ?

But in your initial prompt, under the image, it lists:

“Mitral valve” — and then later “Left ventricle”, etc.

Actually, rereading your input:

You wrote:

```
Pulmonary
(semi-lunar)
valve

Superior
vena cava
10

Aorta
(aortic
arch)
1

Right
atrium
2

Tricuspid
valve
4

Right
ventricle
3

SAMPLE

Pulmonary
artery
6

Pulmonary
veins
7

Left
atrium
8

Mitral valve
?

Left
ventricle
9

Inferior
vena cava
11
```

And also:

“Pulmonary (semi-lunar) valve” points to #5.

So #5 is pulmonary semilunar valve.

Then “Mitral valve” — in the diagram, it must be pointing to the valve between #8 and #9. But is there a number there? In your text, you didn’t assign a number to mitral valve — but we have 11 numbers and 11 labels.

Wait — perhaps I missed: in the original image, the mitral valve might be labeled with a number? Let me think differently.

Alternative approach: list all labeled structures and their corresponding numbers as per standard labeling.

From common heart diagrams:

- 1: Aorta
- 2: Right atrium
- 3: Right ventricle
- 4: Tricuspid valve
- 5: Pulmonary valve (semilunar)
- 6: Pulmonary artery
- 7: Pulmonary veins
- 8: Left atrium
- 9: Left ventricle
- 10: Superior vena cava
- 11: Inferior vena cava

And the mitral valve is typically between 8 and 9, but in this diagram, it may not have its own number — however, in your image description, you have “Mitral valve” written with a line, but no number attached? Or is it possible that #5 is sometimes confused?

No — you clearly said “Pulmonary (semi-lunar) valve” points to #5.

Then “Mitral valve” must be another structure. But we’ve used all 11 numbers.

Unless... wait — in your initial problem statement, you have:

“Labeled & Unlabeled” — meaning some are labeled in red, and we need to fill in the blue numbers.

Looking back at your very first message:

The image has red labels for names, and blue numbers 1-11 on the diagram.

Our task is to say what each blue number represents.

So let’s map each blue number to the structure it’s drawn on or near.

Based on standard anatomy and typical labeling:

- #1: Top large vessel coming out of left side → Aorta
- #2: Upper right chamber → Right atrium
- #3: Lower right chamber → Right ventricle
- #4: Valve between right atrium and right ventricle → Tricuspid valve
- #5: Valve at exit of right ventricle to pulmonary artery → Pulmonary semilunar valve
- #6: Vessel going to lungs from right ventricle → Pulmonary artery
- #7: Vessels coming from lungs to left atrium → Pulmonary veins
- #8: Upper left chamber → Left atrium
- #9: Lower left chamber → Left ventricle
- #10: Vein entering top of right atrium → Superior vena cava
- #11: Vein entering bottom of right atrium → Inferior vena cava

And the mitral valve is between #8 and #9, but it doesn't have a blue number in this diagram — the red label "Mitral valve" is there, but no blue number is assigned to it. So we don't need to assign a number to it; we just assign the existing blue numbers.

Therefore, the correct matching is:

1 - Aorta
2 - Right atrium
3 - Right ventricle
4 - Tricuspid valve
5 - Pulmonary semilunar valve
6 - Pulmonary artery
7 - Pulmonary veins
8 - Left atrium
9 - Left ventricle
10 - Superior vena cava
11 - Inferior vena cava

This matches all 11 numbers.

Final Answer:
1 - Aorta
2 - Right atrium
3 - Right ventricle
4 - Tricuspid valve
5 - Pulmonary semilunar valve
6 - Pulmonary artery
7 - Pulmonary veins
8 - Left atrium
9 - Left ventricle
10 - Superior vena cava
11 - Inferior vena cava