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Heart: Blood Pressure

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Heart:
Heart has 4 chambers, 2 atria and 2 ventricles. De-oxygenated blood comes back to the right side of the heart with the venous circulation, pumped into the right ventricle and then to the lungs, there, carbon dioxide is released and exchanged with oxygen. The oxygenated blood then travels back to the left side of the heart into the left atria, heading to left ventricle, aorta, and finally arterial circulation. Blood travels from right side to left side via the lungs only.
The pressure created in the arteries by the contraction of the left ventricle is the systolic blood pressure. After the left ventricle contracts, it begins to relax, then refills with blood from the left atria, meanwhile the pressure in the arteries falls, this is the diastolic blood pressure. In other words, during systole, cardiac muscle tissue is contracting to push blood out of the chamber; during diastole, the cardiac muscle cells relax to allow the chamber to fill with blood; systolic blood pressure is the higher number and diastolic blood pressure is the lower number. …show more content…

Pericardium produces serous fluid to lubricate the heart and prevent friction between the beating heart and surrounding organs, and assure its

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