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There are 60,000 miles of blood vessels in every adult human.

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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

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In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Horses too young to be ridden are trained to accept a halter, taught basic skills, manners, and beco Horses too young to be ridden are trained to accept a halter, taught basic skills, manners, and beco
Visual Acuity Testing, Snellen Vision Chart Visual Acuity Testing, Snellen Vision Chart
Testing Visual Fields by Confrontation: Visual Fields Range Testing Visual Fields by Confrontation: Visual Fields Range
The Human Visual Cortex The Human Visual Cortex
The basic structure of a spermatozoon (SPERM). The basic structure of a spermatozoon (SPERM).
The basic structure of the IL-2 receptor. The basic structure of the IL-2 receptor.
Video: Subunits of DNA And Semi Conservative Replication

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