Essay --

The cardiac cycle is vestibular sense to one complete heartbeat, first the atria contracts and then ventricles contract and then relax. This tail assembly be marked by the many changes in blood quite a little and drive within the heart. While the heart is in complete serenity (diastole) the pressure in the heart is very low, blood is flowing from the pulmonary and systemic circulations into the atria and on through and through to the ventricles the semilunar valves atomic number 18 closed and the AV valves are open (Pearson, 475). Not long after atrial muscular contraction occurs and atrial pressure increases, forcing residual blood into ventricles, then ventricular systole begins and intraventricular pressure increases swiftly, closing the AV valves. The ventricular pressure surpassed when this happens the semilunar valves are forced open, and the blood in the ventricular chambers is dispersed through the valves. In the course of this phase the aortic pressure reaches approxi mately 120mmHg in a healthy young adult. During ventricular systole the atria relax and their chambers replete with blood, resulting in a gradual increase in atrial pressure (Martini, 684). At the end of ventricular systole, the ventricles relax the semilunar valves closes shut (preventing backflow), and momentarily, the ventricles are closed chambers. The aortic semilunar valve snaps shut ca use a riotous increase in the aortic pressure, results from the elastic recoil of the aorta after the valve closes. As the ventricles relax, the pressure within them begins to drop. The fairish heart beats approximately 75 beats per minute, the length of the cardiac cycle is about 0.8 second (Martini,). in that location are sounds heard in the cardiovascular system result from degraded blood flow. There are two unmistakable sounds ... ...ds have disappeared the diastolic pressure is recorded. After the data is collected you must then count on your numbers to get your mean arterial pressu re (MAP) using the conventionalism two-thirds diastolic plus one-third systolic (MAP=2/3 diastolic + 1/3 systolic). Checking my pulse before and after scant(p) coiffe I was able to obtain my cardiac output using the decree heart rate times stroke tidy sum (CO=HR(SV)) because stroke volume varies with gender as well as body type prof Raj provides us with those numbers. After those numbers were calculated we were then able to broadsheet the total peripheral resistance (TPR) using what information we already had using the formula MAP/CO. In the data that follows you will see the average for a group of 25 people for each mean arterial pressure, cardiac output, and total peripheral resistance before and after the light exercise.