Question

Blood & Circulation
1. The ___________ is the big push and the ______________ is the reloading push.
2. As you move away from the heart, your vessels get [ bigger / smaller ].
3. If your capillaries are driveways, your ______________ are houses.
4. All the blood in your vessels could stretch around the earth ___________ times.
5. When the left side of your heart squeezes, blood goes to your ________________.
6. I have more [ red blood cells / white blood cells ] in my bloodstream.
7. Which lives longer? [ red blood cells / white blood cells ]
8. It takes ______ sec. for blood to go around your body when you’re exercising.
9. Exercising brings __________________ to your muscles.
10. Your heat pumps _________________liters per day!
11. During your lifetime, your heart will beat about _______ billion times.
12. Label the diagram of the circulatory system using these terms:
Aorta (2)
Left Auricle or Atrium (LA)
Left Ventricle (LV)
Lungs
Pulmonary Artery (4)
Pulmonary Vein (1)
Right Auricle (RA)
Right Ventricle (RV)
Vena Cava (3)
Tissues of the body
13. Colour the path of oxygenated blood red and deoxygenated blood
blue.
14. Use arrows to indicate blood flow direction.
Blue Blood or Red Blood?
Rule #1: All flow Away from the heart.
Rule #2: always lead to the heart.
Rule #3: All Arteries carry blood EXCEPT the
Rule #4: All Veins carry blood EXCEPT the

Answer 1

1. The systole (big push) and the diastole (reloading/relaxation push).
2. Smaller.
3. Cells (the tissues of the body / houses).
4. About 2.5 times.
5. The rest of your body (systemic circulation / body tissues).
6. Red blood cells.
7. Red blood cells (RBCs ≈120 days; most WBCs live much less, though some lymphocytes can live years).
8. About 20 seconds (during exercise).
9. More oxygen (and nutrients).
10. About 7,000 liters per day.
11. About 2.5 billion times (order of magnitude ~2–3 billion).
12. Number labels for the diagram:
- 1 = Pulmonary Vein
- 2 = Aorta
- 3 = Vena Cava
- 4 = Pulmonary Artery
Also label: Left Auricle/ Atrium (LA), Left Ventricle (LV), Right Auricle/ Atrium (RA), Right Ventricle (RV), Lungs, Tissues of the body.
13. Colour oxygenated blood path red; deoxygenated blood path blue.
14. Use arrows showing flow: RA → RV → Pulmonary Artery → Lungs → Pulmonary Vein → LA → LV → Aorta → Body tissues → Vena Cava → RA (repeat).

Blue Blood or Red Blood? (Rules)
- Rule #1: All arteries flow away from the heart.
- Rule #2: All veins always lead to the heart.
- Rule #3: All arteries carry oxygenated blood EXCEPT the pulmonary artery (carries deoxygenated blood to lungs).
- Rule #4: All veins carry deoxygenated blood EXCEPT the pulmonary veins (carry oxygenated blood from lungs).