How Your Heart Works

All blood enters the right side of the heart from the two veins of the superior vena cava (SVC) and the inferior vena cava (IVC) (see Figure 3).

SVC draws blood from the top of the body. IVC draws blood from the lower half of the body. Blood leaves SVC and IVC in the right atrium (RA) (3)

When RA contracts, blood passes through the tricuspid valve (4) and enters the right ventricle (RV) (5). When the RV contracts, blood passes through the pulmonary valve (6), into the pulmonary artery (PA) (7), and into the lung where it absorbs oxygen.

Why is this happening? Blood returned from the body has less oxygen. It needs to be filled with oxygen before returning to the body. Therefore, the right side of the heart first pumps blood into the lung to absorb oxygen, then enters the left side of the heart and returns to the body filled with oxygen.

Blood enters the left atrium (LA) (9) from the lungs through the pulmonary veins (8). When the LA contracts, blood enters the left ventricle (LV) through the mitral valve (10) (11). LV is a very important chamber that pumps blood into the aortic valve (12) and the aorta (13). The aorta is the main artery of the body. It takes all the blood pumped up by the heart and distributes it to the rest of the body. The muscle of LV is thicker than any other heart chamber. In order to resist higher pressures (blood pressure) in the whole blood circulation it is necessary to pump blood to other parts of the body.

When your heart pumps blood into your body, blood pressure is the blood pressure above the arterial wall. It is an important part of your heart and blood circulation. Your blood pressure naturally changes up and down and adjusts your heart's needs based on your activity. Hypertension means that your blood pressure will stay above normal. Blood pressure measurement value from 120/80 mmHg or less to 139/89 mmHg is within the normal range from normal range. Long-term hypertension is one of the major risk factors for heart disease. As you get older, the possibility of sustained high blood pressure increases

Expanded heart hypertension increases the burden on the heart. Just like your body's muscles, your heart grows larger (expanded) to handle extra workload. The bigger the heart, the more oxygen it needs but the less ability to maintain blood flow properly. As a result, you feel weak and tired, you can not exercise, you can not do physical activity. Leaving untreated, your heart failure only gets worse. Drink plenty of alcohol. According to experts, average intake is 1 to 2 times per person per day, and women are once per day. Beverages are defined as 1/2 fluid ounces (80 ounces) alcohol, 1 fluid ounce 100 alcohol, 4 fluid ounces wine, or 12 fluid ounces beer.

•heart. As mentioned above, your heart rate increases with physical activity and supplies more oxygen-containing blood to your muscles. The more you are healthy, the more effective your heart can do, and you allow you to exercise longer. As a side effect, this enhanced efficiency also reduces your resting heart rate. Your blood pressure also declines due to the formation of new blood vessels. •brain. Increased blood flow also benefits your brain, making it work almost instantaneously. Therefore, there is a tendency to concentrate more after exercise. In addition, regular exercise promotes the growth of new brain cells. In your hippocampus, these new brain cells help to improve memory and learning. As described in the feature article: