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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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Blood is approximately twice as thick as water because of the cells and other components found in it.

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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

Homunculus maps of human body parts along the cerebral cortex. Homunculus maps of human body parts along the cerebral cortex.
Deformation in human bones caused by (a) rickets and (b) osteoporosis. Deformation in human bones caused by (a) rickets and (b) osteoporosis.
Amsterdam Albatross - Adult in flight, showing dark plumage typical of the species. Amsterdam Albatross - Adult in flight, showing dark plumage typical of the species.
The Black Bee-eater (Merops gularis) is a species of bird in the Meropidae family. The Black Bee-eater (Merops gularis) is a species of bird in the Meropidae family.
(A) The stages in utero of human development. (A) The stages in utero of human development.
Pattern of retinal stimulation in the human eye Pattern of retinal stimulation in the human eye
Video: Electromagnetic Spectrum, Chlorophyll and Pigment & Light

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