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 of the body, and transports metabolic waste …

In this week's episode, Blood editor Dr. Laura Michaelis interviews authors Drs. Marion Falabrègue and Ajai Chari on their papers published in volume 146 issue 24 of Blood.

Make a difference by donating at our Irving Donor Center. The Irving Donor Center has beds to accommodate six donors at a time and has a goal of collecting donations from 550 donors per …

Mar 2, 2026 · Blood is a fluid that transports oxygen and nutrients to cells and carries away carbon dioxide and other waste products. It contains specialized cells that serve particular functions. These …

Jul 21, 2025 · Blood is a specialized fluid that constantly flows throughout your body. It’s made of plasma, red blood cells, white blood cells and platelets.

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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 blood—a mixture of about 55% …

Detailed information on blood, including components of blood, functions of blood cells and common blood tests.

The main job of red blood cells, or erythrocytes, is to carry oxygen from the lungs to the body tissues and carbon dioxide as a waste product, away from the tissues and back to the lungs.

There are more than 200 American Red Cross Blood Donation Centers across the United States. Complete the form below to learn more about your local Blood Donation Center.