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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

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On average, the stomach produces 2 L of hydrochloric acid per day.

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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

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Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

The use of bacteria to make human insulin The use of bacteria to make human insulin
Insect species diversity on British host trees supports the area hypothesis. Insect species diversity on British host trees supports the area hypothesis.
Sites of mtDNA mutations in certain human diseases Sites of mtDNA mutations in certain human diseases
Thorax Anterior view of human body Thorax Anterior view of human body
View of the bottom surface of the human brain. View of the bottom surface of the human brain.
Hydrozoan. Hydra, a freshwater species capturing and digesting a water flea. Hydrozoan. Hydra, a freshwater species capturing and digesting a water flea.
Video: Phases of an Action Potential - Resting Potential, Threshold, Rising, Falling, & Recovery Phases

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