About 29,100,000 results
Open links in new tab
  1. Blood | American Society of Hematology

    Dec 4, 2025 · In this special episode, Blood editor Dr. Laura Michaelis interviews Dr. Arielle Langer and Blood Associate editor Dr. Marc Blondon for this special Maternal Health episode.

  2. 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 …

  3. Blood - Wikipedia

    In vertebrates, the various cells of blood are made in the bone marrow in a process called hematopoiesis, which includes erythropoiesis, the production of red blood cells; and myelopoiesis, …

  4. 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.

  5. Blood Types Explained - A, B, AB and O - Red Cross Blood

    Nov 28, 2025 · Blood types are determined by the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body. Since some antigens …

  6. Blood Basics - Hematology.org

    The blood that runs through the veins, arteries, and capillaries is known as whole blood—a mixture of about 55% plasma and 45% blood cells. About 7% to 8% of your total body weight is blood.

  7. Facts About Blood - Johns Hopkins Medicine

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

  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. How to Read Blood Test Results: What “Normal” Really Means for Your ...

    Nov 19, 2025 · Confused by your blood work? Learn what common tests measure, how to interpret your results, and when to follow up with your healthcare provider.

  10. Blood Types: Main Groups, Most Common, and Rarest

    Nov 23, 2025 · The ABO system has four major blood types: A, B, AB, and O. Blood types are further categorized by the presence (positive or +) or absence (negative or -) of the Rh (D) antigen on the …