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The River of Life - Blood

The River of Life - Blood. Blood – Did You Know…. An average adult has approximately 4.7 L (5 quarts) of blood. Blood comprises about 8% of a person’s total body weight. Blood travels 60,000 mi (96,540 Km) per day in your body. 15 million blood cells die every day and have to be replaced.

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The River of Life - Blood

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  1. The River of Life - Blood

  2. Blood– Did You Know… • An average adult has approximately 4.7 L (5 quarts) of blood. • Blood comprises about 8% of a person’s total body weight. • Blood travels 60,000 mi (96,540 Km) per day in your body. • 15 million blood cells die every day and have to be replaced.

  3. What is the Composition of Blood? • Blood is about 78% liquid and 22% solids • Four Major Components of Blood • Plasma • Red Blood Cells (RBC) • White Blood Cells (WBC) • Platelets

  4. BloodPlasma—The Liquid of Life • Composition: • 90% water • Ionic salts (electrolytes) • Soluble proteins • Functions: • Helps maintain homeostatic balance • Allows for the correct function of muscles and nerves • Transports soluble substances • Carries factors needed for blood clotting

  5. Plasma Transports: • Nutrients • Electrolytes • Hormones • Antibodies • Clotting factors • Metabolic wastes • Dissolved Gases: oxygen and carbon dioxide

  6. Red Blood Cells (Erythrocytes) • Most abundant blood cell • 5.2 billion RBC per mL of blood • Mature cells lack a nucleus • Average Lifespan: 120 Days Used with permission of Brian Garrigan http://health.howstuffworks.com/blood.htm

  7. Red Blood Cell Facts • Can be frozen for ten years • Hemoglobin makes up 33% of cell mass • Primary function is to transport oxygen • Help remove carbon dioxide • Produced in bone marrow • Travel single file through capillaries

  8. White Blood Cells (Leukocytes) • Types • Monocyte • Neutrophil • Lymphocyte • Basophil • Eosinophil See Pictures of These Cells

  9. White Blood Cell Facts • Largest of the blood cells • Normally 5000 to 10,000 WBC per mL blood • Variable life span – from a few days to years • Produced in bone marrow • Part of the immune system • Increase in number when infection or inflammation is present

  10. White Blood Cells—Functions • Monocytes and Neutrophils: • Destroy bacteria and other foreign materials • Signal other immune cells that foreign material is inside body Lymphocytes: • Destroy abnormal cells • Produce antibodies • Moderate immune response

  11. White Blood Cells—Functions • Eosinophils • Kill multicellular parasites (e.g. blood fluke) Basophils • Can destroy foreign material • Involved in inflammation response • Involved in development of allergies

  12. Platelets (Thrombocytes) • Formed in bone marrow • Not cells, are fragments of precursor cells • Lifespan—10 Days • Help blood clot by forming “platelet plugs.” • Stimulate other clotting factors • Approximately 250,000 per mL of blood

  13. Simulated Blood Smear Used with permission of Ken Hoge http://texasheart.org/HIC/Anatmy/blood.cfm?&RenderForPrint=1

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