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Did you know?
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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On average, the stomach produces 2 L of hydrochloric acid per day.