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Name the order of blood vessels starting and ending at the heart
back to heart
What are the key characteristics of arteries
Carry blood away from the heart, attached to ventricles,contain smooth muscle & elastic tissue
What type of artery would the aorta be classified as
Elastic, largest and able to withstand really high blood pressure
What are the characteristics of veins
carry blood from all tissues & return to the r & l atrium, thinner walls than arteries, contain valves in their walls, contain 65% of body's blood
Is the tunica media of a vein thinner or thicker than an artery, explain
Thinner, blood pressure is lower so they do not need as much smooth muscle
What happens when valves in the veins weaken
blood tends to pool in the veins leading to varicose veins or hemorrhoids
What does the muscular compression pump do
contractions of skeletal muscles help push blood toward the heart, occurs during normal movement, walking
How does the blood flow through a capillary bed
Bands of smooth muscle at the entrance of capillaries, precapillary sphincters alternately contract & relax, as a result blood flow occurs in pulses .
What is vasomotion
Cycling of contraction & relaxation of smooth muscle that changes blood flow thru capillary beds
What is a precapillary sphincter
Band of smooth muscle that controls blood flow thru a capillary bed
What is the blood circulation formula
Blood flow is proportional to pressure gradient divided by resistance
What are the different types of pressures that exist within blood vessels
Arterial, Capillary Hydrostatic pressure(CHP) & venous
What are the types of resistance that exist in blood vessels
Vascular resistance, Viscosity, & Turbulence
Define pulmonary circuit
Consists of vessels that carry blood FROM the heart, TO the lungs, and BACK TO the heart.
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