Disorders of Blood Vessels Arteriosclerosis results from a loss of elasticity

Disorders of blood vessels arteriosclerosis results

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Disorders of Blood VesselsArteriosclerosisresults from a loss of elasticity in the aorta, large arteries, and coronary arteriesAtherosclerosisis the deposition of lipid in arterial walls to form plaquesAneurysmweak spot in a blood vessel where it balloons out and may ruptureVaricose vein developed when the valves of the veins become weak and ineffectivePhlebitisinflammation of a veinand blood clots may formThrombosisformation of a blood clot inside a blood vesselEmbolism obstruction of a blood vessel by a blood clot that travels in the bloodDeep veins of the legNormal blood flowDeep veins thrombosisEmbolusDeep vein thrombosisCatheter inVein causingRedness andinflammationVeinBlood clot(thrombus)Inflammation and thrombusformation due to trauma of veinAneurysmAtherosclerosisEndotheliumVessel wallAtherosclerotic plaque
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Disorders of Blood VesselsHeart attack blood flow to the heart stopsStroke (brain attack) blood flow to a part of brain stops
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Pulmonary and Systemic CirculationPulmonary circuit-The blood pathway between theright side of the heart to the lungs,and back to the left side of the heartSystemic circuit-The blood pathway between theleft side of the heart to the body,and back to the right side of the heart
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Systemic CirculationArteries carry blood from the left ventricle of the heart through the aortaMove blood to all parts of the body Return blood to the right atriumthrough the superior and inferior vena cava
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Pulmonary Circulation Moves blood to and from the lungsPulmonary trunk arises from the right ventricle and divides to form the pulmonary arteries (R and L), which project to the lungsFrom the lungs, four pulmonary veinsreturn blood to the left atrium 25-40
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Portal CirculationA portal venous system is a seriesof veins that directly connect twocapillary bedsExamples:Hepatic portal system-collects blood from the gastro-intestinal tract & spleen to theliver Hypophyseal portal system-connects neurons in the hypothalamus to endocrine cells in the pituitary glandHepatic portal systemHypophyseal portal system26-40
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AnastomosisAnastomosisA connection between bloodvessels by means of collateralchannelsTo provide alternative pathwayswhen usually routes are obstructedVenous anastomosisin the legArterial anastomosisat the elbow jointArteriovenous anastomosisvia the thoroughfare channelThoroughfare channelVenuleArterioleCapillary bed27-40
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Cardiovascular SystemComprises:-Heart-Blood vessels-Blood cells 28-40
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BloodBlood contains: Plasma(liquid)Cells(red blood cells, whiteblood cells, platelets)29-40
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PlasmaPlasma-Light yellow liquid portion of the blood-Makes up about 55% of blood content-Contains salts, clotting factors, hormones, antibodies, dissolved gases, nutrients and wastesNote:Serumis the liquid portion of clotted blood(without fibrinogen).
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