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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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There are 20 feet of blood vessels in each square inch of human skin.

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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

The Saltwater Crocodile is the largest species of crocodile in the world. The Saltwater Crocodile is the largest species of crocodile in the world.
Flowchart to determine if a species is autotroph, heterotroph, or a subtype Flowchart to determine if a species is autotroph, heterotroph, or a subtype
The Human Visual Cortex The Human Visual Cortex
The major human endocrine glands and their central nervous system control centers The major human endocrine glands and their central nervous system control centers
Major features of human genome Major features of human genome
Some threatened and endangered species Some threatened and endangered species
Video: How Hemoglobin Picks Up and Delivers Oxygen

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