Which blood cells exhibit phagocytosis?

Which enzyme is useful to convert inactive fibrinogen into fibrins?

Mammals have biconcave $RBCs$. The physiological advantage of this shape is:

If glucose is to be injected into human blood,the property that must be matched with blood is

Which is the primary cation present in the blood plasma?

$A$ person meets with an accident and a great loss of blood has occurred. There is no time to analyze his blood group. It is safe to transfuse blood of group: