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Lecture Medical assisting: Administrative and clinical procedures (5e) - Chapter 27: The blood

After studying this chapter you will be able to: Describe the structure of the heart and the function of each; explain the cardiac cycle, including the cardiac conduction system; compare pulmonary and systemic circulation; differentiate among the different types of blood vessels and their functions;. | 27 The Blood Learning Outcomes (cont.) 27.1 Describe the components of blood, giving the function of each component listed. 27.2 Explain how bleeding is controlled. 27.3 Explain the differences among blood types A, B, AB, and O; including in the discussion which blood types are compatible. Learning Outcomes (cont.) 27.4 Explain the difference between Rh- positive blood and Rh-negative blood. 27.5 Describe the causes, signs and symptoms, and treatments of various diseases and disorders of the blood. Introduction Blood 4-6 liters per adult ~ 8% of body weight Essential functions Carries oxygen and nutrients Removes carbon dioxide and wastes Transport mechanism for hormones Regulation of body temperature Learning Outcome: 27.1 Describe the components of blood, giving the function of each component listed. Blood is a type of connective tissue that is made up of multiple parts, including red and white blood cells, cell fragments (platelets), and plasma. Blood volume varies from | 27 The Blood Learning Outcomes (cont.) 27.1 Describe the components of blood, giving the function of each component listed. 27.2 Explain how bleeding is controlled. 27.3 Explain the differences among blood types A, B, AB, and O; including in the discussion which blood types are compatible. Learning Outcomes (cont.) 27.4 Explain the difference between Rh- positive blood and Rh-negative blood. 27.5 Describe the causes, signs and symptoms, and treatments of various diseases and disorders of the blood. Introduction Blood 4-6 liters per adult ~ 8% of body weight Essential functions Carries oxygen and nutrients Removes carbon dioxide and wastes Transport mechanism for hormones Regulation of body temperature Learning Outcome: 27.1 Describe the components of blood, giving the function of each component listed. Blood is a type of connective tissue that is made up of multiple parts, including red and white blood cells, cell fragments (platelets), and plasma. Blood volume varies from person to person depending on: The person’s size The amount of adipose tissue in the body The concentrations of certain ions in the blood Females generally have less blood volume than males. Components of Blood Red blood cells – erythrocytes Small biconcave-shaped cells Small enough to pass through capillaries Learning Outcome: 27.1 Describe the components of blood, giving the function of each component listed. Blood Components (cont.) Hematocrit The percentage of red blood cells Normally about 45% White cells and platelets = 1% Plasma = 55% Learning Outcome: 27.1 Describe the components of blood, giving the function of each component listed. Blood Components (cont.) Hemoglobin Oxyhemoglobin carries oxygen Deoxyhemoglobin ~ carries carbon dioxide RBC count Normally between 4 million and 6.5 million RBC/ml Anemia Learning Outcome: 27.1 Describe the components of blood, giving the function of each component listed. In mature RBCs the nuclei is replaced by hemoglobin. .