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CCMA CH 6

CCMA CH 6 REVIEW (Body Systems - Cardiovascular)

TermDefinition or Function
cardiovascular system - pumps blood throughout the body - blood carries essential oxygen and nutrients to cells; aids in eliminating waste
heart in the mediastinum (central chest) to pump blood throughout the body - 3 layers (epicardium, myocardium, endocardium) - 4 chambers (right/left atria, right/left ventricle)
artery/arteriole thick-walled vessels that carry blood away from the heart - propel blood with each contraction of the heart and associated pulse points - smaller branches are arterioles
vein/venule thinner-walled vessels that carry blood toward the heart; contains valves to prevent backflow - smaller branches are venules
capillary the smallest blood vessels that connect arterioles to venules - aid in the exchange of oxygen and nutrients between blood and body cells
endocardium innermost layer of cells that lines the atria, ventricles, and heart valves
myocardium muscular layers of the heart
pericardium outermost layer of the heart; a membrane that surrounds the he art and secretes pericardial fluid
heart valves prevent backflow of blood intro atria when ventricles contract - tricuspid valve is between right atrium and right ventricle - bicuspid (mitral) valve is between left atrium and left ventricle
blood circulation through 2 pathways - systemic and pulmonary - (systemic) arteries, arterioles, capillaries, venules, and veins - (pulmonary) arteries, arterioles, capillaries, venules, and veins going to, within, and coming from the lungs
heart electrical conduction system keeps cardiac muscle contracting and blood flowing - mapped analyzed using electrocardiogram (EKG) to detect heart issues
cardiac cycle - electrical impulses by sinoatrial (SA) node - from SA node, travels to atrioventricular (AV) node - impulse goes to bundle of His -- bundle branches (in ventricular septum) - travels to Purkinje fibers, causing ventricles to contract and pump blood
Created by: linju156
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