25 Blank Heart Diagram to Label | Softball Wristband Template - Free Printable

Explanation:
Let’s go step by step to label the heart parts and fill in the chart.

First, recall how blood flows through the heart:

1. Deoxygenated blood (low in oxygen, dark red/purple) enters the heart through the superior and inferior vena cava → into the right atrium → through the tricuspid valve → into the right ventricle → pumped out via the pulmonary artery to the lungs.

2. In the lungs, blood picks up oxygen → becomes oxygenated (bright red) → returns via the pulmonary veins → into the left atrium → through the mitral (bicuspid) valve → into the left ventricle → pumped out via the aorta to the body.

Now, match each labeled part (based on standard heart diagram positions):

- Top-right large vein entering right atrium → Superior Vena Cava
- Bottom-right large vein entering right atrium → Inferior Vena Cava
- Large vessel leaving right ventricle (goes to lungs) → Pulmonary Artery
- Veins entering left atrium (usually 4, but shown as a group) → Pulmonary Veins
- Large vessel leaving left ventricle (goes to body) → Aorta
- Upper right chamber → Right Atrium
- Lower right chamber → Right Ventricle
- Upper left chamber → Left Atrium
- Lower left chamber → Left Ventricle

(There are 8 blank labels — matching these 8 structures.)

Now fill the chart:

| Structure | Oxygenated / Deoxygenated Blood | Function |
|-------------------|----------------------------------|----------|
| Vena cava | Deoxygenated | Brings deoxygenated blood from body to right atrium |
| Aorta | Oxygenated | Carries oxygenated blood from left ventricle to body |
| Pulmonary Artery | Deoxygenated | Carries deoxygenated blood from right ventricle to lungs |
| Pulmonary Vein | Oxygenated | Carries oxygenated blood from lungs to left atrium |
| Right Atrium | Deoxygenated | Receives deoxygenated blood from body (via vena cava) |
| Right Ventricle | Deoxygenated | Pumps deoxygenated blood to lungs (via pulmonary artery) |
| Left Atrium | Oxygenated | Receives oxygenated blood from lungs (via pulmonary veins) |

Note: The left ventricle is not listed in the chart, but it would be oxygenated and pumps blood to the body via the aorta.

Double-check:
- Vena cava → deoxygenated ✔
- Aorta → oxygenated ✔
- Pulmonary artery → deoxygenated ✔ (only artery carrying deoxygenated blood)
- Pulmonary vein → oxygenated ✔ (only veins carrying oxygenated blood)
- Right side of heart = deoxygenated ✔
- Left side = oxygenated ✔

All consistent.

Final Answer:
Labeling (from top-left clockwise, typical diagram order):
1. Superior Vena Cava
2. Aorta
3. Pulmonary Artery
4. Pulmonary Veins
5. Inferior Vena Cava
6. Right Atrium
7. Right Ventricle
8. Left Atrium

Chart completed as:
- Vena cava: Deoxygenated; Returns deoxygenated blood from body to right atrium
- Aorta: Oxygenated; Delivers oxygenated blood from left ventricle to body
- Pulmonary Artery: Deoxygenated; Carries deoxygenated blood from right ventricle to lungs
- Pulmonary Vein: Oxygenated; Returns oxygenated blood from lungs to left atrium
- Right Atrium: Deoxygenated; Receives deoxygenated blood from vena cava
- Right Ventricle: Deoxygenated; Pumps deoxygenated blood to lungs via pulmonary artery
- Left Atrium: Oxygenated; Receives oxygenated blood from pulmonary veins