Student Chapter 19A zool

Student Chapter 19A - Introduction to the Cardiovascular System A circulating transport system A pump(the heart A conducting system(blood vessels A

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Introduction to the Cardiovascular System • A circulating transport system – A pump (the heart) – A conducting system (blood vessels) – A fluid medium ( blood ) • Is specialized fluid of connective tissue • Contains cells suspended in a fluid matrix
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Introduction to the Cardiovascular System • To transport materials to and from cells – Oxygen and carbon dioxide – Nutrients – Hormones – Immune system components – Waste products
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Functions of Blood Transport of dissolved substances Regulation of pH and ions Restriction of fluid losses at injury sites Defense against toxins and pathogens Stabilization of body temperature
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Physical Characteristics of Blood • Whole Blood –P lasma • Fluid consisting of: – water – dissolved plasma proteins – other solutes – Formed elements
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Physical Characteristics of Blood Figure 19–1 The Composition of Whole Blood
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Physical Characteristics of Blood Figure 19–1b The Composition of a Typical Sample of Plasma
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Physical Characteristics of Blood Figure 19–1c The Composition of Formed Elements of Blood
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Physical Characteristics of Blood • Three Types of Formed Elements Red blood cells (RBCs) or erythrocytes • Transport oxygen White blood cells (WBCs) or leukocytes • Part of the immune system Platelets • Cell fragments involved in clotting
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Physical Characteristics of Blood • Hemopoiesis – Process of producing formed elements – By myeloid and lymphoid stem cells • Fractionation – Process of separating whole blood for clinical analysis • Into plasma and formed elements
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Physical Characteristics of Blood • Three General Characteristics of Blood – 38°C (100.4°F) is normal temperature – High viscosity – Slightly alkaline pH (7.35–7.45)
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Physical Characteristics of Blood • Blood volume (liters) = 7% of body weight (kilograms) – Adult male: 5 to 6 liters – Adult female: 4 to 5 liters
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Plasma • Makes up 50–60% of blood volume • More than 90% of plasma is water • Extracellular fluids – Interstitial fluid (IF) and plasma – Materials plasma and IF exchange across capillary walls • Water • Ions • Small solutes
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Differences between Plasma and IF – Levels of O
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This note was uploaded on 02/06/2012 for the course ZOOL 2304 taught by Professor Gollahon during the Fall '11 term at Texas Tech.

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Student Chapter 19A - Introduction to the Cardiovascular System A circulating transport system A pump(the heart A conducting system(blood vessels A

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