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 … 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 bloodâ€a mixture of about 55% … Blood is a specialized fluid that constantly flows throughout your body. It’s 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.

It’s 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.