Body Fluids and Circulation Question 25

25. What is true about leucocytes ?

[2000]

(a) Their sudden fall in number is indication of blood cancer.

(b) These are produced in thymus.

(c) These are enucleated.

(d) These can squeeze out through the capillary walls.

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Answer : d

Hints & Solutions

(d) Leucocytes are colourless, nucleated amoeboid cells found in blood which are devoid of haemoglobin and are capable of coming out of blood capillaries through the process of diapedesis. Fall of WBC count is called leucopenia, and occurs due to folic acid deficiency and AIDS etc.