2-27-08 anatomy notes

2-27-08 anatomy notes - anatomy notes1.Circulatory...

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Unformatted text preview: 2-27-08 anatomy notes1.Circulatory Systema.Heart Sounds (associated w/cardiac cycles)i.Normal1.Systolic (1st)-long duration and low pitcha.Ventricles contract, bicuspid & tricuspid valves closei.They make the sounds heard through a stethoscope2.Diastolic (2nd)-short duration and high pitcha.Relaxation of ventricles and closure of semilunar valves cause the soundsii.Abnormal-murmurs and are usually produced during the cardiac cycle b/c of heart valve malfunction1.Stenosis-valves are narrowed so they do NOT open to their fullest extenta.This is due to vegetations (fusions of portions of valve tissue by scar tissue)b.Blood flows through narrowed opening more rapidly than normal which creates a murmuri.This occurs in bicuspid, tricuspid, or semilunar valves2.Valvular Insufficiency (incompetence)a.Valves do not completely close during the cardiac cycle b/c of loss of tissue at the edges of valvesb.Valves leak blood backwards (regurgitation)i.Can occur in bicuspid, tricuspid, or semilunar valves...
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This note was uploaded on 04/02/2008 for the course BIOL 20204 taught by Professor Barcellona during the Fall '07 term at TCU.

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2-27-08 anatomy notes - anatomy notes1.Circulatory...

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