Cardiovascular = Circulatory System Blood. Blood General functions Amount of blood – 5-6 liters in...
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Transcript of Cardiovascular = Circulatory System Blood. Blood General functions Amount of blood – 5-6 liters in...
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Cardiovascular = Circulatory Cardiovascular = Circulatory SystemSystem
Blood
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BloodBlood
General functionsAmount of blood
– 5-6 liters in males, 4-5 liters in females– 8% of body weight
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FORMED ELEMENTSFORMED ELEMENTS
Cells45% blood
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Erythrocytes = RBCsErythrocytes = RBCs
4-5 million/mm3Hemoglobin
– Iron– Function– Color
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RBCsRBCs
HemopoiesisErythropoiesis (2 million/second)Life span about 120 daysDestroyed and recycled by liver & spleenErythropoeitin
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RBCsRBCs
Stay in blood vesselsABO systemAntigenAntibodyA,B,AB,O blood types
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RBCsRBCs
Rh factorErythroblastosis fetalis
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Leukocytes = WBCsLeukocytes = WBCs
5000-9000/mm3Granulocytes
– Neutrophils (pale granules, segmented nucleus, most numerous, phagocytosis)
– Eosinophils (red granules, segmented nucleus, phagocytosis, attacks parasites)
– Basophils (purple granules, semented nucleus, releases histamine & heparin
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Agranulocytes– Lymphocytes (T & B, immunity, round
nucleus)– Monocytes (bean-shaped nucleus, foamy
cytoplasm, exit bloodstream & enlarge and become MACROPHAGES)
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Life spanFormation
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Function of WBCsFunction of WBCs
Phagocytosis– Lytic enzymes– Macrophages
Antibodies– Plasma Cells– Vaccination
T cells
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Thrombocytes = PlateletsThrombocytes = Platelets
100,000-300,000/mm3Stays in blood vesselsLife spanProduction in bone marrow
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HemostasisHemostasis
Vascular constrictionPlatelet plug formation
– ADP
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Hemostasis - CoagulationHemostasis - Coagulation
Conversion to an insoluble fibrin clotClotting factorsFibrinogen is converted to FibrinBy Thrombin – precursor is prothrombinLiver makes clotting factorsVitamin K
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CoagulationCoagulation
Extrinsic mechanism– 15-20 seconds – Initiates with damaged tissue releasing
thromboplastin
Intrinsic mechanism– 1-2 minutes– Hemophilia
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Clot RetractionClot Retraction
30-60 minutes laterSerum
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Clot ControlClot Control
Heparin from mast cellsBasophilsEndothelium is smooth
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FibrinolysisFibrinolysis
Clot dissolutionPlasmin
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Intravascular ClottingIntravascular Clotting
ThrombusEmbolus (Embolism)
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PlasmaPlasma
55% of bloodWater – Over 90%Proteins
– Albumin– Globulin– Fibrinogin
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Interstitial FluidInterstitial Fluid
Similar to plasmaBathes tissues