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Did you know?

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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Thyroid conditions may make getting pregnant impossible.

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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Activity versus specific activity Activity versus specific activity
The pH-activity profiles of two enzymes The pH-activity profiles of two enzymes
Neurotransmitter reuptake activity. Neurotransmitter reuptake activity.
Classical-Conditioning Activity Classical-Conditioning Activity
Dog Temperament Activity Dog Temperament Activity
Effects of alterations in Shh morphogen activity in the floor plate and the limb bud Effects of alterations in Shh morphogen activity in the floor plate and the limb bud
Video: Bone cells and tissues - tissue composition and cells

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