Name the blood cells whose reduced count causes excessive loss of blood from the body due to a defect in the blood clotting process.

If the foetus is $Rh^+$ and the mother is $Rh^-$,then:

If one litre of blood is drawn out of $5 \; \text{litres}$ from the body of a man, how much blood would be left by the next day?

What is the medium of transport in higher organisms?

$A$ reduction in their number will lead to excessive loss of blood from the body.

Given below are two statements:
Statement $I$:
The coagulum is formed of a network of threads called thrombins.
Statement $II$:
Spleen is the graveyard of erythrocytes.
In the light of the above statements,choose the most appropriate answer from the options given below: