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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.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Did you know?
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.