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19 Cards in this Set
- Front
- Back
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Regulation of Venous Returna nd End Diastolic Volume
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see pg. 11 of packet and 4/20 in notes
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Blood Vessel Layers
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Tunica intima -
Tunica media Tunica externa |
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Arteries
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Elastic
Stretch during ventricular contraction because blood is pushed into blood system Recoil durin Arteries push blood forwardg ventricular relaxation |
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Veins
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Collect blood from tissues and return it to the heart
Walls of veins are thinner than arteries, but diameters are bigger Veins may have valves to prevent backflow Compression of veins by the contraction of adjacent skeltal muscle helps keep pushing blood flow along in veins |
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Blood Vessels
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Elastic Arteries
Muscular artery Arterioles Continuous capillary Fenestrated capillary Venule Medium-sized vein Large vein |
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Elastic Artery
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Tunica intima is made up of endothelium and internal elastic layer
Used for checking pulse |
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Continuous Capillary
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Most of the body is supplied by continuous capillaries
Endothelium is a complete lining |
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Fenestrated Capillary
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Capillaries that contain pores that penetrate the endothlial lining
Permit rapid exchange of water and solutes In kidneys, intestines, and part of brain |
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Arteriole
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Have a poorly defined tunica externa
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Venules
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Lack a tunica media
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Capillary bed
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see pg. 727
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Distribution of Blood
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amount of blood is about 5 litersMost of the blood is in systemc venous system - 64%
sYSTEMIC ARTERIAL SYSTEM - 13% Pulomonary circuit - 9% Systemic capillaries - 7% Heart - 7% |
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Blood Pressure
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First sound of blood pressure is Korokoff sounds
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Taking Blood Pressure
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Use the brachial artery
Pump up cuff above 140 As cuff goes down to 120 hear first korokoff sound Sound stops after cuff drops below diastolic pressure |
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Pressure
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CSA - cross sectional area
As CSA increases, velocity of blood flow decreases As CSA decreases, velocity increases |
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Coronary Bypass
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Grafting of coronary blood vessels to heart to avoid vessels damaged by atherosclerosis
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Angioplasty/Angiography
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Angiography - views vessels from inside
Angioplasty - cleans out damaged vessels |
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Stent
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Put in blood vessels to keep the lumen opened wide
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Procedures used in Heart Surgery
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Cracking the ribs
Can use robotics |
