Final Answer:
The labels correspond to the following parts of the circulatory system (from top to bottom, left to right as typically arranged on such a sheet):
1. Superior vena cava
2. Aorta
3. Pulmonary artery
4. Right atrium
5. Right ventricle
6. Left atrium
7. Left ventricle
8. Inferior vena cava
9. Brachial artery (left)
10. Radial artery (left)
11. Femoral artery (left)
12. Dorsal pedal artery (left)
13. Brachial vein (right)
14. Axillary vein (right)
15. External iliac vein (right)
16. Great saphenous vein (right)
*(Note: Exact labeling may vary slightly depending on diagram orientation, but these are the standard major vessels and chambers expected for a human circulatory system activity sheet.)*
Parent Tip: Review the logic above to help your child master the concept of the circulatory system worksheet.