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the largest artery in the body which transports blood from the left ventricle of the heart to the entire body
aortic semilunar valve
valve located in the aorta that prevents backflow of blood into the left ventricle
atrioventricular (av) node
specialized cells that delay the electrical conduction through the heart & allow the atria time contract
one of the upper 2 small chambers of the heart. the right atruim receives blood from the body through the vena cava and the left atruim receives blood from the lungs through the pulmonary vein
the ability of a cardiac cell to initiate an electrical impulse, without being stimulated by anther source, causing a cardiac contraction
left and right branches of the bundle of his that conduct impulses down either side of the interventricular septum to the left and right ventricles
bundle of his
a bundled of fibers that orginate in the av node and enter the interventricular septum conducting electrical impulses to the left and right bundle branches
the period from the beginning of one heartbeat to the beginning of the next: the cardiac cycle is made up of the systole and diastole
the ability of the heart muscle cells to shorten in responce to an electrical stimulas
the electrical activation of the cells of the heart that initias contraction of the heart muscle
the phase of the cardiac cycle when the heart is expanding and refilling also know as the relaxtion phases
the period when the electrical tracing of the ekg is at zero or a straight line no postive or negative deflections are seen
the left lower chamber of the heart which pumps oxygenated blood through the body. it is the biggest and strongest chamber know as the workcourse of the heart
mitral (bicuspid valve)
valve with 2 cusps located between the left atruim and left ventricle it prevents backflow of blood into the left atruim
a blackage of one or more of the cornoary artieries causing lack of oxygen to the <3 and damage the muscle tissue
the state of cellur rest in which the inside is negatively charged and the outside is positivitly charged
the largest artery that transport deoxygenated blood from the right ventricle to the lungs during pulmonary circulation
the transportation of blood to and from the lungs : blood of oxygenated in the lungs during pulmonary circulation
pulmonary semilunar valve
a valve found in the pulmonary artery that prevents blood flow of blood into the right ventricle during pulmonary circulation
a blood vessel that transports blood from the lungs to the left atruim. the only vein that carrys oxygenated blood
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