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Ch. 12 A

QuestionAnswer
components of blood and their volumes formed elements (2.5 L) and plasma (3 L)
blood vessels fit into 3 general categories arteries, capillaries and veins
arteries take blood away from the heart and are the major regulatory component for blood flow
capillaries do what...and they can... exchange things like oxygen, food and wastes...open or close
veins go ...and are called... towards the heart ..blood reservoires
where is there more blood in veins (not arteries) because veins have less muscle with larger diameter
what is the flow at rest in the brain 650 ml/min (13%)
what is the flow at rest to the heart 215 ml/min (4%)
what is the flow at rest to the skeletal muscles 1030 ml/min (20%)
what is the flow at rest to the skin? 430 ml/min (9%)
what is the flow at rest to the kidneys? 950 ml/min (20%)
what is the flow at rest to the abdominal organs? 1200 ml/min (24%)
what is the flow at rest in "other" 525 ml/min (10%)
why is there more blood going to organs they are still working even during rest and digest
why is the kidney not included in abdominal organs it is retroperitoneal
the atria are chambers through which bloow flows from...and atrial contraction adds to... veins to ventricles...ventricular filling but is not essential for it
ventricles are chambers whose contractions produce the...through the... pressure that drives blood...pulmonary and systemic vascular systems and back to the heart
arteries are... that conduct blood to the.. low-resistance tubes...various organs with little loss in pressure
arteries also act as pressure reservoirs for maintaining blood flow during ventricular relaxation
arterioles are the major sites of...and are responsible for the... resistance to flow..the pattern of blood flow distribution to the various organs
arterioles participate in the regulation of arterial blood pressure
capillaries are the major sites of nutrient, metabolic end product, and fluid exchange between blood and tissues
venules are the sites of... nutrient, metabolic end product, and fluid exchange between blood and tissues
veins are...for blood flow... low-resistance conduits...back to the heart
plasma is the...of blood that contains... liquid portion...dissolved nutrients, ions, wastes, gases and other substances
pathway of blood flow pattern: arteries to arterioles to capillaries to veins to venules
pulmonary circulation goes from the... heart to lungs and back to heart
pulmonary circulation pathway right vent to pulmonary trunk to arteries to lungs to pulmonary veins to left atrium
what is the key for this chapter?! pressure, flow and resistance!!
bulk flow is one directional flow where all components of the blood move
what makes sure that flow is in one direction valves and pumps
hemodynamics include bulk flow: blood flow, hydrostatic pressure, resistance
blood flow is...measured as... volume...F (L/min)
hydrostatic pressure is the... pressure gradient between 2 different locations DELTA P
hydrostatic pressure is measured through the... displacement of mercury (mm Hg) P
resistance is measured as... R (mm Hg/mL/min)
resistance is inversely proportional to vessel diameter
vessel diameter is the most changeable factor
resistance is proportional to blood viscosity (resistance to flow) and vessel length (greater distance means greater resistance)
equation for flow F = delta P/R
why does more blood go to the abdominal organs? they are working even at rest
systemic circulation goes from.. heart to body and back to heart
systemic circulation pathway left ventricle to aortic arch to body (head also) to vena cavae to right atrium
Created by: handrzej