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Formed Elements: Leucocytes
Concepts tested here
- Diapedesis of WBCs
All Questions
2000 AIPMT 1 question
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Which statement is true for WBC :White blood cells (leucocytes) are nucleated and are produced mainly in the red bone marrow (some lymphocytes mature in the thymus).
They can change shape and squeeze out through the walls of blood capillaries into the tissues. This is called diapedesis, and it lets them reach sites of infection.
A deficiency of WBCs (leucopenia) lowers immunity; leukaemia (a cancer) is associated with an excess of abnormal WBCs.
So the true statement is that WBCs can squeeze through blood capillaries.