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Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

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Your heart beats over 36 million times a year.

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Child with cerebral palsy has abnormal muscle tone and lack of physical coordination. Child with cerebral palsy has abnormal muscle tone and lack of physical coordination.
The major skeletal muscles—anterior superficial view. The major skeletal muscles—anterior superficial view.
Posterior view of major muscles. Posterior view of major muscles.
The lack of permanent disruption of language-related abilities after surgical excision of the ... The lack of permanent disruption of language-related abilities after surgical excision of the ...
Major muscles of the arm. Major muscles of the arm.
Albinos lack pigment in the skin, hair, and eyes. Albinos lack pigment in the skin, hair, and eyes.
Video: Immune responses Animation

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