Lab 4 - Cardiovascular

Lab 4 - Cardiovascular - Lab 4 The Cardiovascular System...

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1 The Cardiovascular System Lab 4 Heart Blood Vessels Blood Major Components: Functions of Cardiovascular System • Transport –Respiratory gases, nutrients, wastes, hormones • Temperature regulation –Vasoconstriction in the cold –Vasodilation in heat
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2 Blood Pathway Vena Cavae Right Atria Right Ventricle Pulmonary Blood Flow Left Atria Left Ventricle Systemic Circulation Blood Pressure 9 The force the blood exerts against the walls of the vessels. Blood Pressure Definitions Cardiac Cycle: z Systole: period of contraction z Systolic BP: arterial pressure during ventricular contraction z Diastole: period of relaxation z Diastolic BP: arterial pressure during ventricular relaxation
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3 Heart Rate Number of times the heart beats per minute. z HR by sympathetic stimulation z HR by parasympathetic stimulation z Bradycardia z Tachycardia z Taken by counting for __ sec and multiplying by __. Cardiac Output Amount of blood pumped by the left ventricle per minute. Q (L/min) = HR x SV * Normal / exercise Stroke Volume 9 Stroke Volume z Amount of blood pumped by the left ventricle with each beat. z Influenced by: z End diastolic volume z Peripheral resistance z Strength of contraction 9 Frank-Starling Law z The larger the blood volume of LV at the end of diastole the larger the volume of blood pumped out per beat.
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This note was uploaded on 08/05/2011 for the course APK 2105 taught by Professor Brooks during the Summer '07 term at University of Florida.

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Lab 4 - Cardiovascular - Lab 4 The Cardiovascular System...

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