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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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Cyanide works by making the human body unable to use oxygen.
![he White-throated Bee-eater, Merops albicollis is a near passerine bird in the bee-eater family Mero](https://biology-forums.com/gallery/47/medium_12359_29_04_12_6_19_16.jpeg)
![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)