If our blood was made up of only the cells that fights pathogens, then what would it's colour be?
A
Colourless
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B
White
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C
Red
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D
Yellow
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Solution
The correct option is D Yellow
Blood is mainly composed of two components- plasma and blood cells.
Plasma is yellow coloured fluid part of the blood.
Blood cells are of three types- RBCs, WBCs and platelets.
RBCs are red in colour due to haemoglobin and functions in transport of gases.
White blood cells and platelets are colourless. WBCs are involved in defense mechanism, while platelets participate in blood clotting.
So, if we have only white blood cells in our body then the colour of the blood will be yellow due to colour of the plasma, since WBCs and platelets are colourless.