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  1. Blood | American Society of Hematology

    Dec 11, 2025 · In this Review Series episode, Blood Associate Editor, Dr. Elisabeth Battinelli discusses the Platelet Heterogeneity with authors Drs. Craig Morrell, Larry Frelinger, and Leo Nicolai. Find the …

  2. Blood - Wikipedia

    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 …

  3. Blood: What It Is & Function - Cleveland Clinic

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

  4. Blood | Definition, Composition, Functions, & Facts | Britannica

    Nov 7, 2025 · 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 …

  5. Blood Basics - Hematology.org

    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% …

  6. Facts About Blood - Johns Hopkins Medicine

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

  7. Functions of the Blood | Circulatory Anatomy - Visible Body

    Blood is composed of 55% plasma and 45% “formed elements,” including red blood cells, white blood cells, and platelets. Because of these living cells suspended in the plasma, blood is considered a …

  8. Blood: Components, functions, groups, and disorders

    Jan 16, 2024 · Blood circulates throughout the body, transporting substances essential to life. Here, learn about the components of blood and how it supports human health.

  9. Blood - MedlinePlus

    May 11, 2023 · The solid part of your blood contains red blood cells, white blood cells, and platelets. Red blood cells (RBC) deliver oxygen from your lungs to your tissues and organs.

  10. Home - NHS Blood Donation

    Register to be a blood donor, give blood and save lives. Find out more about blood donation.