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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.
Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
The human body produces and destroys 15 million blood cells every second.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.