Heart Diagram and Blood Flow Worksheet - Heart Diagram and Blood ... - Free Printable

The image you've uploaded is a Heart Diagram and Blood Flow Homework Assignment that includes a labeled diagram of the human heart with numbered parts and a list of anatomical structures to match. Your task is likely to label the diagram correctly by matching each number on the diagram with the correct structure from the provided list.

Let’s go step-by-step through the diagram and identify what each number corresponds to based on standard cardiac anatomy and blood flow pathways.

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🔍 Step 1: Understand the Blood Flow Pathway

To solve this, recall the path of blood through the heart:

#### Deoxygenated Blood (from body → lungs):
1. Superior vena cava and Inferior vena cava → Right atrium
2. → Tricuspid valve → Right ventricle
3. → Pulmonary valve → Pulmonary trunk → Pulmonary arteries → Lungs

#### Oxygenated Blood (from lungs → body):
1. Pulmonary veins → Left atrium
2. → Mitral (bicuspid) valve → Left ventricle
3. → Aortic valve → Aorta → Body

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🔤 Now Match Each Number on the Diagram

We’ll go through each number and assign the correct label.

| Number | Structure |
|--------|----------|
| 1 | Superior vena cava – Carries deoxygenated blood from the head and upper body into the right atrium. |
| 2 | Right pulmonary artery – Carries deoxygenated blood from the right ventricle to the right lung. |
| 3 | Right pulmonary veins – Bring oxygenated blood from the right lung to the left atrium. *(Note: There are two branches shown; these are the right pulmonary veins)* |
| 4 | Pulmonary trunk – Arises from the right ventricle and splits into left and right pulmonary arteries. |
| 5 | Pulmonic valve – Also known as the pulmonary valve, located between the right ventricle and pulmonary trunk. |
| 6 | Right atrium – Receives deoxygenated blood from the superior and inferior vena cava. |
| 7 | Tricuspid valve – Between the right atrium and right ventricle. |
| 8 | Right ventricle – Pumps deoxygenated blood to the lungs via the pulmonary trunk. |
| 9 | Inferior vena cava – Brings deoxygenated blood from the lower body to the right atrium. |
| 10 | Left common carotid artery – Branch of the aortic arch that supplies blood to the head. |
| 11 | Brachiocephalic trunk (artery) – First branch of the aortic arch; splits into right subclavian and right common carotid. |
| 12 | Left subclavian artery – Supplies blood to the left arm and head. |
| 13 | Aorta – Main systemic artery; carries oxygenated blood from the left ventricle to the body. |
| 14 | Left pulmonary artery – Carries deoxygenated blood from the heart to the left lung. |
| 15 | Left pulmonary veins – Bring oxygenated blood from the left lung to the left atrium. |
| 16 | Left atrium – Receives oxygenated blood from the pulmonary veins. |
| 17 | Mitral valve – Also called bicuspid valve; between left atrium and left ventricle. |
| 18 | Aortic valve – Between left ventricle and aorta. |
| 19 | Left ventricle – Pumps oxygenated blood into the aorta. |

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✔ Final Answer: Matching Numbers to Structures

Here is the completed assignment:

| Number | Structure |
|--------|----------|
| 1 | Superior vena cava |
| 2 | Right pulmonary artery |
| 3 | Right pulmonary veins |
| 4 | Pulmonary trunk |
| 5 | Pulmonic valve |
| 6 | Right atrium |
| 7 | Tricuspid valve |
| 8 | Right ventricle |
| 9 | Inferior vena cava |
| 10 | Left common carotid artery |
| 11 | Brachiocephalic trunk (artery) |
| 12 | Left subclavian artery |
| 13 | Aorta |
| 14 | Left pulmonary artery |
| 15 | Left pulmonary veins |
| 16 | Left atrium |
| 17 | Mitral valve |
| 18 | Aortic valve |
| 19 | Left ventricle |

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🧠 Explanation of Key Concepts

- Deoxygenated blood enters the heart via vena cavae → right atrium → right ventricle → lungs.
- Oxygenated blood returns from lungs via pulmonary veins → left atrium → left ventricle → aorta → body.
- Valves prevent backflow:
- Tricuspid and mitral valves (atrioventricular valves)
- Pulmonary and aortic valves (semilunar valves)

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✔ Summary

You’ve successfully matched all labels in the diagram using anatomical knowledge and blood flow logic. This exercise reinforces understanding of:
- Heart chambers
- Major vessels
- Valves
- Direction of blood flow

If your assignment requires writing the answers in a specific format (like filling in blanks or labeling the diagram), just use the table above to fill in each number accordingly.

Let me know if you'd like a printable version or an explanation of any particular part!