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anatomy

QuestionAnswer
the double pump function of the heart includes the right pump and the left side pulmonary, systemic
major difference between left and right ventricles the L.V pumps blood through the high resistance systemic circulation
average maximum pressure developed in the right ventricle 15-28mm
the heart id surrounded by the pericardial cavity
the function of the chordea tendineae is to anchor the AV valve flaps and prevent back flow of blood
the folds of fibrous tissue that ensure a one-way flow of blood from the atria into the ventricles atrioventricular valves
the portion of the pericardial membrane that lies in the surface of the heart is the visceral pericardium
the viceral pericaridium is the same as epicardium
the function of the pericardium includes anchoring the heart to surrounding structures
the outer surface of the heart id covered by epicardium
the layer of the heart wall that contains cardiac muscle tissue, blood vessels,and nerves myocardium
the hearts inner surface, including the heart valves is covered by the chordae tendinae
the principal kind of tissue making up the endocardium and epicardium is epithelial tissue
the blood returning from the systemic circuit first enters the right atrium
blood returning from the lungs enters the left atrium
the right ventricle pumps blood to the lungs
the left ventricle pumps blood to the systemic circuit
the right atrium receives blood from the inferior vena cava
the atrioventricular valve located on the right side of the heart tricuspid valve
blood leaving the right ventricle enters the pulmonary artery
the pulmonary semilunar valve guards the entrance to the pulmonary truck
the bicuspid or mitral valve is located between the left atrium and left ventricle
the entrance to the ascending aorta is guarded by a semilunar valve
the function of an atrium is to collect blood
the left and right pulmonary arteries carry blood to the lungs
the left and right pulmonary veins carry blood to the heart
in a cardiac muscle cell, and action potential lasts approx. how much longer than the duration of an action potential in a skeletal cell 25-30
specialized noncontractile muscle cells of conducting system are necessary control and coordinate the activities of the contractile cells
in cardiac muscle neither summation nor tentany can occur
the pacemaker cells of the heart are located in the SA node
in contrast the skeletal muscle, cardiac muscle contracts on its own autorthythicity
in a hearts conducting system, nodal cells and conducting cells do not contract
the lub dub sound of the heart have practical clinical valve because they provide information concerning the efficiency of the heart valves
when a chamber of the heart fills with blood and prepares for the start of the cardiac cycle diastole
at the start atrial systole, the ventricles are filled to approx. 70%
the first heart sound is heard when AV valves close
systole and diastole refer to contraction and relaxation of the heart
the amount of blood ejected by the left ventricle per minute cardiac output
Created by: igrit
 

 



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