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Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

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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.

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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Cervical plexus drawing Cervical plexus drawing
Bones change radically in size and shape from newborn to adult, as these cervical vertebrae demonstr Bones change radically in size and shape from newborn to adult, as these cervical vertebrae demonstr
Right lateral view of several articulated thoracic vertebrae Right lateral view of several articulated thoracic vertebrae
The Lumbar Vertebrae: Right Lateral View of Vertebra The Lumbar Vertebrae: Right Lateral View of Vertebra
Anatomy of the Spinal Cord: Cross Section Through the Spinal Cord in the Cervical Region Anatomy of the Spinal Cord: Cross Section Through the Spinal Cord in the Cervical Region
Cervical Spine Exam Reminder Cervical Spine Exam Reminder
Video: Introduction to Insulin

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