Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells, and transports metabolic waste products away Ò€¦ Blood donation near you at a donor center or on the big red bus. Give blood or platelets today to help save lives tomorrow.

It has four main components: Plasma, red blood cells, white blood cells, and platelets. The blood that runs through the veins, arteries, and capillaries is known as whole bloodÒ€a mixture of about 55% Ò€¦ Blood is a specialized fluid that constantly flows throughout your body. ItÒ€ℒs made of plasma, red blood cells, white blood cells and platelets. Detailed information on blood, including components of blood, functions of blood cells and common blood tests.

ItÒ€ℒs made of plasma, red blood cells, white blood cells and platelets. Detailed information on blood, including components of blood, functions of blood cells and common blood tests.