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vc a&p study guide

vc lvn study guide chapter 18

QuestionAnswer
structure of arteries - thick muscular walls - small lumen - pushes blood along by contraction (hence our pulses)
blood pressure in the arteries must maintain high pressure to keep blood flowing through the circulatory system
State the pathway of the pulmonary circulation from the heart to the lungs and back to the heart. the flow of blood from the right ventricle through the pulmonary artery to the lungs, where carbon dioxide is exchanged for oxygen, and back through the pulmonary vein to the left atrium.
What is the pacemaker of the heart? SA (sinoatrial valve)
How does blood move in the capillaries? pulse waves gradually dissipates as it travels through the circulatory system disappearing entirely
structure of veins - have valves to prevent back flow of blood - thinner walls, - wider lumen
structure of capilla - one cell thick - smaller than veins and arteries - don't have valves or muscular walls
blood pressure in the veins blood flow and venous return use stress-relaxation effect to maintain a relatively steady state
Where does it exchange? capillaries >nutrients< tissue within capillary beds
Where does it exchange? capillaries >oxygen< tissue within the lungs
Where does it exchange? capillaries >waste products< tissue waste products are eventually eliminated from the bloodstream by the liver, kidneys, and lungs.
Where does it exchange? capillaries >CO2< tissue peripheral tissues release CO2
urium & amino acids waste of cells
Created by: acmkibc