Blood heart sound is the closing of the semilunar

      Blood
Pressure is when your heart pumps blood around your body to give it the oxygen
and nutrients it needs. Blood Pressure is measured in millimeters of mercury
(mm Hg). The number on top is known as systolic blood pressure, which is the
pressure in your arteries while the heart pumps blood. The number on the bottom
is known as diastolic blood pressure, which is when your heart is relaxed while
it refills with blood. A good blood pressure would be a reading of 120/80 mm Hg
and below. Low blood pressure also known as hypotension is when you have a
reading of 90/60 mm Hg and lower. (Simon 2012) Blood pressure is important
because of its relationship with the heart and all its functions. It helps
function the arteries, blood vessels, and it maintains the flow of blood so
that all organs get the nutrients and oxygen they need. (Culvert 2015) Heart
rate is the number of heart beats per minute. The heart is an organ that works
as a pumping system. The Cardiac Cycle releases a sound that you can here with a
stethoscope. The first sound you hear is the closing of the atrioventricular
valves and the second heart sound is the closing of the semilunar valves. (Longe
2006) For this experiment, we are testing that if an individual holds their
breathe for 30 seconds, then their heart rate will increase by 15 percent. The
null hypothesis would be if an individual holds their breathe for 30 seconds
there will be no effect on blood pressure. The importance of this experiment is
to learn more about blood pressure and the affects it has on our body.

 

Methods
and Materials

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     To
conduct this experiment, we needed two people (yourself and your partner for it
to work more sufficient), a sphygmomanometer, a timer, a writing utensil, and a
piece of notebook paper (to write down your results).

      First, we started off with taking our partners
basal blood pressure by using the sphygmomanometer. Then while one was holding
their breathe for thirty seconds and using the cuff, the other one was watching
the time. Then every two minutes for three rounds the partner would take their
blood pressure. After each round, we wrote down the number we got. After all of
that is done for one partner, then we switched so the other partner could
experience it. Our controlled group was not holding our breath. Our standard
group was time, temperature and room. Our independent group was holding our
breath and our dependent group blood pressure.