The human body produces and destroys 15 million blood cells every second.
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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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The average office desk has 400 times more bacteria on it than a toilet.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
Blank periodic table
Drugs and their effect table
At breakfast, a middle-class husband sits absorbed in the newspaper and the public affairs of the da