5_Cardio_Blood%20Ch%2019 - 19-1Chapter 19Cardiovascular...

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Unformatted text preview: 19-1Chapter 19Cardiovascular System: BloodCardiovascular systemBlood is a major componentFunctions?Composed ofThe HeartBlood vesselsBLOODCharacteristics of BloodBlood = what type of tissue?Composed of a variety of cells and their extracellular matrix37-54%Formed elements46-63%Liquid medium = 19-4Composition of Blood1/30/07PlasmaContains mostly water (92%)Electrolytes and proteins (7%)Free-floating stuffProteins Always remain in the plasma give viscous consistency3 main plasma proteinsPlasmaAlbuminsFunctions?GlobulinsFunctions?FibrinogenFunctions?Blood tests: Plasma vs. SerumSerum = Thus what has been removedbut also removes 19-919-10Formed ElementsRed Blood Cells = Erythrocytes (RBCs)Function of RBCs Transports O2from tissue to lungs Transports CO2from cells/tissue to lungsStructureSaucer-shaped cell = biconcave diskSpecial featuresLack of these organelles is advantageous to functionNo nucleus = no cell division = Cell can assume biconcave shape how is that an advantage?19-12Red Blood CellsFound in higher concentration in male than in female plasmaComponents1/3 Hemoglobin2/3 Lipids, ATP, carbonic anhydraseFormed Elements: RBCsImportance of Shape to function (review in text)No mitochondria O2 necessary for ATP production If present, the O2will be consumedAlso gives more space in the cellMolecular content of RBCsStocked with Hemoglobin (Hb)Protein Makes up 95% of all intracellular proteinsThere are approx. 280 million molecules of Hb in eachRBCNormal range in grams per mL whole blood = g/dl ?Hb = protein with 4 pieces (subunits)4 polypeptide chains = Types?Molecular content of RBCsWith each globin there is a hemegroupSpecial chemical compound containing Fe2+Fe2+of globin binds to ? Blood leaving lungs is rich in O2 Fe- O2= bright red in color Blood going to lungs containing CO2= dark red in colorMolecular content of RBCsRBCs contain a special enzymeCarbonic Anhydrase Helps in CO2transport in the blood (later)Formed Elements: White Blood CellsWhite Blood Cells = LeukocytesApprox. 0.1% of blood totalCome in many shapes and formsGranular (3 types)Agranular (2 types)Common FeaturesSpecific targets of each type of WBCsFunctions:Clean Up & DefenseGuarding the Bodypatrol the area where?...
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This note was uploaded on 03/21/2011 for the course BIOLOGY 1120 taught by Professor Chapman during the Spring '11 term at Georgia State University, Atlanta.

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5_Cardio_Blood%20Ch%2019 - 19-1Chapter 19Cardiovascular...

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