SC BIOL 244 - Ch. 17 Blood (2 pages)

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Ch. 17 Blood

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Ch. 17 Blood


Blood components

Lecture number:
Lecture Note
University Of South Carolina-Columbia
Biol 244 - Human Anatomy/phys Ii

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BIOL 244 1st Edition Chapter 17 Blood Lecture 7 Cardiovascular System Circulatory system consists of the heart blood vessels and the blood Hematology is the study of blood Functions Transportation of O2 CO2 nutrients wastes hormones stem cells Protection Inflammation Limit spread of infection Destroy microorganisms and cancer cells Neutralize toxins Initiates clotting Regulation Fluid balance Stabilizes pH of ECF Temperature control Blood liquid connective tissue consisting of cellular and extracellular matrix Blood volume 5 6 L of blood in adults Plasma liquid matrix of blood Clear light yellow fluid Mixture of water proteins nutrients electrolytes nitrogenous wastes hormones gases 47 63 total volume Serum remaining fluid when blood clots and solids are removed Identical to plasma except for absence of fibrinogen Plasma proteins Albumins smallest and most abundant Contributes to viscosity and osmolarity Influences blood pressure flow and fluid balance Globulins antibodies Provide immune system functions Fibrinogen Precursor of fibrin threads that help form blood clots Nonprotein components Nitrogenous compounds Free amino acids from dietary protein or tissue breakdown Nitrogenous wastes urea toxic end products of catabolism Normally removed by kidneys Nutrients Glucose vitamins fats cholesterol phospholipids minerals Dissolved gases O2 CO2 Nitrogen Electrolytes Na makes up 90 of plasma cations Formed elements blood cells and cell fragments 3 major types Erythrocytes red blood cells Heaviest and settle first 37 52 total volume Leukocytes white blood cells 1 total volume 5 types divided into two categories Granulocytes Neutrophils most abundant Eosinophils Basophils Agranulocytes Lymphocytes Monocytes Thrombocytes platelets cell fragments from special cell in bone marrow 1 total volume Properties of blood Viscosity resistance of a fluid to flow resulting from the cohesion of its particles Whole blood 4 5 5 5 times as viscous as water Plasma is 2 times as viscous as

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