You’ve uploaded a worksheet titled
“Components of Blood and Blood Groups (Worksheet) – Solution”, which includes two questions: one true/false section (Q1) and one labeling diagram (Q2). I’ll solve and explain both.
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✔ Q1. True or False Statements
Let’s evaluate each statement one by one:
1. Blood is red body fluid which circulates in the body.
✔ Answer: T (True)
Explanation: Blood is indeed a red-colored fluid connective tissue that circulates throughout the body via the heart and blood vessels. It transports oxygen, nutrients, hormones, and waste products.
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2. The average adult has about 4.7 to 5.5 liters of blood.
✔ Answer: T (True)
Explanation: This is medically accurate. An average adult male has about 5–6 liters, and an average adult female has about 4–5 liters — so 4.7 to 5.5 liters is a reasonable general range for adults.
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3. Red blood cells fight against germs which cause disease.
✘ Answer: F (False)
Explanation: Red blood cells (RBCs or erythrocytes) carry oxygen and carbon dioxide — they do
not fight germs. That’s the job of
white blood cells (leukocytes). So this statement is false.
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4. Mature red blood cells do not possess nucleus.
✔ Answer: T (True)
Explanation: In humans and most mammals, mature RBCs lose their nucleus during development to make more space for hemoglobin, allowing them to carry more oxygen. This is a key feature of mammalian RBCs.
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5. Platelets are considered as true cells.
✘ Answer: F (False)
Explanation: Platelets (thrombocytes) are
not true cells — they are small fragments of larger bone marrow cells called megakaryocytes. They lack a nucleus and most organelles, so they’re technically cell fragments, not complete cells.
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✔ Q2. Label the major components of the blood on the diagram below
The diagram shows three stages:
- Whole blood sample
- Sample placed in centrifuge (spinning)
- Blood sample that has been centrifuged (layered)
After centrifugation, blood separates into three main layers:
From top to bottom:
#### 1.
Top Layer → Plasma
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Color: Pale yellow
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Composition: Liquid portion of blood (~55% of total volume), contains water, proteins, hormones, ions, etc.
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Label: ✔️
Plasma
#### 2.
Middle Thin Layer → Platelets and White Blood Cells (Buffy Coat)
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Color: Thin whitish layer
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Composition: Contains platelets and white blood cells (WBCs). This layer is called the “buffy coat.”
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Label: ✔️
Platelets and white blood cells
#### 3.
Bottom Layer → Red Blood Cells
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Color: Dark red
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Composition: Most abundant component; carries oxygen.
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Label: ✔️
Red blood cells
> 💡 Note: The worksheet already has these labels filled in correctly with orange text — your solution matches the correct biological separation.
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## 🧪 Summary of Answers:
Q1:
1. T
2. T
3. F
4. T
5. F
Q2:
- Top layer →
Plasma
- Middle layer →
Platelets and white blood cells
- Bottom layer →
Red blood cells
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✔ All answers are correct and explained based on human physiology and blood composition.
Let me know if you’d like a printable version or further diagrams!
Parent Tip: Review the logic above to help your child master the concept of components of blood worksheet.
