Question

name the by products of coal used for street lighting​

Answer 1

⛂ White blood cells or WBC are one type of blood cells.

⛂They donot have hemoglobin,hence they are colourless.

⛂They are also called as leucocytes.

⛂They are less in number when compared to the RBC.

⛂They are two types⤞Granulocytes Agranulocytes.

⛂Granulocytes are three types.They are neutrophils,basophils and esinophils.

⛂Granulocytes attack and destroy the micro organisms that enter the blood.

⛂Agranulocytes are two types :- They are lymphocytes and monocytes.

⛂Lymphocytes secret anti- bodies to gaurd against foreign material, that enter into blood.

⛂So, Lymphocytes are also called as microscopic policemen.

⛂Monocytes attack the foreign materials and destroyed them.

⛂So , they are called as Scavengers.

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