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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

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Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

scanning electron micrograph showing an ovum (pink) released by the ovary at ovulation surrounded by scanning electron micrograph showing an ovum (pink) released by the ovary at ovulation surrounded by
Ectopic pregnancies. (a) An ectopic pregnancy may occur in any of the locations shown. Interstitial Ectopic pregnancies. (a) An ectopic pregnancy may occur in any of the locations shown. Interstitial
Pathogens and artificial fingernails Pathogens and artificial fingernails
Common Bacterial Pathogens Common Bacterial Pathogens
Reemerging Pathogens Reemerging Pathogens
Pathogens That Cause Foodborne Illness (2 of 5) Pathogens That Cause Foodborne Illness (2 of 5)
Video: Stomach peristalsis - Movement of Food Through the Small Intestine

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