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Major content provider: U.S. National Cancer Institute

Blood

Blood is the fluid of life, transporting oxygen from the lungs to body tissue and carbon dioxide from body tissue to the lungs. Blood is the fluid of growth, transporting nourishment from digestion and hormones from glands throughout the body. Blood is the fluid of health, transporting disease fighting substances to the tissue and waste to the kidneys. Because it contains living cells, blood is alive. Red blood cells and white blood cells are responsible for nourishing and cleansing the body.

Without blood, the human body would stop working.

To learn more about blood, select a topic listed below to branch into a sub-section.

  • Classification & Structure of Blood Vessels
  • Physiology of Circulation
  • Circulatory Pathways

 

David L. Heiserman, Editor

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All Rights Reserved

Revised: June 06, 2015