Blood is a fluid that transports oxygen and nutrients to the cells and carries away carbon dioxide and other waste products. Technically, blood is a transport liquid pumped by the heart to all parts of the body, after which it is returned to the heart to repeat the process.
The blood that runs through the veins, arteries, and capillaries is known as whole blood, a mixture of about 55 percent plasma and 45 percent blood cells.
Plasma:
The liquid part, called plasma, is made of water, salts, and protein. Over half of your blood is plasma. Plasma contains 91% to 92% of water and 8% to 9% of solids.
The solid part of your blood contains red blood cells, white blood cells, and platelets.
Final answer : The liquid part of the blood is plasma.