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Blood - Wikipedia
Components of blood (article) | Khan Academy
Blood | Definition, Composition, & Functions | Britannica
Blood: Function, What It Is & Why We Need It - Cleveland Clinic
Facts About Blood | Johns Hopkins Medicine
Blood | American Society of Hematology
Blood: Components, functions, groups, and disorders - Medical News Today
18.1 An Overview of Blood - Anatomy and Physiology 2e
Blood | MedlinePlus
Quick Facts:Overview of Blood - MSD Manual Consumer Version