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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.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.