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The Liquid Tissue

The Liquid Tissue. BLOOD. Blood. Blood performs two major functions : Transport through the body of oxygen and carbon dioxide food molecules (glucose, lipids, amino acids) ions (e.g., Na+, Ca2+, HCO3−) wastes (e.g., urea) hormones heat

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The Liquid Tissue

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  1. The Liquid Tissue BLOOD

  2. Blood Blood performs two major functions: • Transport through the body of • oxygen and carbon dioxide • food molecules (glucose, lipids, amino acids) • ions (e.g., Na+, Ca2+, HCO3−) • wastes (e.g., urea) • hormones • heat • Defense of the body against infections and other foreign materials. All the WBCs participate in these defenses

  3. Components of Blood Liquid portion: Plasma • mostly water • carries just about everything (except O2/CO2)

  4. Cellular portion: Red Blood Cells • Most numerous cellular portion of blood • Have no nuclei; not “true” cells • contain hemoglobinprotein that carries O2 • Look a little like Cheerios

  5. Cellular portion: White blood cells • Fight infections– Eat foreign, dead/dying, abnormal cells • Have nuclei • Several different types • Macrophages • Neutrophils

  6. Cellular portion: Platelets • Cell fragments • Help with clotting (making “scabs”)

  7. How many parts can you identify in this blood smear? RBC? WBC? Platelets? Plasma? Did you get ‘em all?

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