Let’s go step by step through each question.
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Q.4 True or False?
1.
In red blood cells, oxygen molecules bind to a protein called hemoglobin.
→ This is TRUE. Hemoglobin is the protein in red blood cells that carries oxygen from the lungs to the rest of the body.
2.
Arteries usually carry oxygenated blood and veins usually carry deoxygenated blood.
→ This is MOSTLY TRUE — but with one big exception: pulmonary arteries carry deoxygenated blood to the lungs, and pulmonary veins carry oxygenated blood back to the heart. But since the statement says “usually,” it’s considered TRUE for general purposes (systemic circulation).
3.
About 55% of blood is made up of plasma, a clear pale-yellow fluid.
→ TRUE. Plasma makes up about 55% of blood volume. It’s mostly water with proteins, salts, and other stuff dissolved in it.
4.
The systemic circulation carries deoxygenated blood from the heart to the lungs.
→ FALSE. That’s the job of the *pulmonary* circulation. Systemic circulation carries *oxygenated* blood from the heart to the body, and brings back deoxygenated blood.
5.
The pulmonary circulation carries oxygenated blood to the body.
→ FALSE. Pulmonary circulation moves blood between the heart and the lungs — it carries deoxygenated blood to the lungs and brings back oxygenated blood to the heart. The *systemic* circulation sends oxygenated blood to the body.
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Q.5 Label the chambers of the human heart
Looking at the diagram (even though we can’t see it, we know standard labeling):
- The top two chambers are the
atria (singular: atrium).
- The bottom two are the
ventricles.
- Right side = receives deoxygenated blood → right atrium and right ventricle.
- Left side = pumps oxygenated blood → left atrium and left ventricle.
Assuming the arrows point as follows (standard diagram layout):
→ Top-left box (pointing to upper left chamber) →
Left Atrium
→ Bottom-left box (pointing to lower left chamber) →
Left Ventricle
→ Top-right box (pointing to upper right chamber) →
Right Atrium
→ Bottom-right box (pointing to lower right chamber) →
Right Ventricle
*(Note: In most diagrams, the heart is shown as if you’re looking at someone else’s chest — so their right is on your left. But labels are based on the person’s own anatomy.)*
So:
- Arrow pointing to the top chamber on the viewer’s left →
Left Atrium
- Arrow pointing to the bottom chamber on the viewer’s left →
Left Ventricle
- Arrow pointing to the top chamber on the viewer’s right →
Right Atrium
- Arrow pointing to the bottom chamber on the viewer’s right →
Right Ventricle
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Final Answer:
Q.4:
1. T
2. T
3. T
4. F
5. F
Q.5:
Top-left box: Left Atrium
Bottom-left box: Left Ventricle
Top-right box: Right Atrium
Bottom-right box: Right Ventricle
Parent Tip: Review the logic above to help your child master the concept of circulation worksheet.
