Dextran is used in

Diapedesis is the characteristic feature of

In a medicolegal case of accidental interchange between two babies in a hospital,the baby of blood group $A$ could not be rightly given to a couple with:

Fibrins are formed by the conversion of inactive fibrinogens in the plasma by the enzyme........

Which of the following is true about plasma?
$(i)$ It contains $90-92 \%$ water.
$(ii)$ It contains $6-8 \%$ proteins.
$(iii)$ It is a straw-coloured,viscous fluid.

Leucocytes are colourless due to