BIOL 1119 Lecture Notes - Lecture 7: Heart Valve, Pulmonary Artery, Qrs Complex
28 Jan 2017
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Karina da rosa: the heart, cardiac cycle i. Principles of pressure and flow: fluid is a state of matter, moves in bulk or mass from one point to another i. Two main variables affect flow: pressure, moves fluid ii. Flow occurs when a fluid experiences more pressure at one point than at another: resistance i. Opposes flow: pressure measured by manometer, atmospheric pressure, measure by how high it bushes mercury column up a tube of a manometer (mm hg, blood pressure is measured with a sphygmomanometer ii. Atria are relaxed and (cid:1152) of filling is in the first stage: phase two : atrial systole, last (cid:1151) filling i. ii. Ventricles contain end-diastolic volume (edv: phase three : isovolumetric contraction of ventricle, atria are repolarized and relax, ventricle depolarize, qrs complex appears in ecg, ventricles begin to contract, rising pressure in the ventricles closes av valves : sounds.
