Biology
Given below is the diagram of human blood smear. Answer the questions that follow:
(a) Mention one structural difference between 1 and 2.
(b) What is the function of part 3?
(c) Name the part labelled 4.
Circulatory System
ICSE Sp 2024
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Answer
(a) The parts labelled 1 and 2 are:
- 1 → Red Blood Cell (RBC)
- 2 → White Blood Cell (WBC)
One structural difference between red blood cells and white blood cells is:
| Red Blood Cells | White Blood Cells |
|---|---|
| Red blood cells are minute biconcave disc-like structures. | White blood cells are amoeboid and can produce pseudopodia with which they can squeeze through the walls of the capillaries into the tissues. |
(b) Part 3 is blood platelet. Its main function is to initiate blood clotting.
(c) Part 4 is blood plasma.
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