The fluid part of blood is known as:

a) plasma

b) platelets

c) blood cells

d) none of these

The fluid part of blood is known as plasma. Plasma is the main component of blood and it mainly contains water. It is the largest component of blood and makes about 55% of blood. Other components of blood are red blood cells, white blood cells and platelets. Plasma facilitates transportation of important substances around the body. Plasma itself consists of 92% water.