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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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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 ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
![Positron emission tomography (PET) image showing the difference in the metabolic activity of the bra](https://biology-forums.com/gallery/47/medium_14755_27_08_12_12_14_19_81821620.jpeg)
![The brain. (a) Superior (top) view. (b) Sagittal view of a sectioned brain to reveal internal featur](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_48_56_94051155.jpeg)