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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

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If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Spider's main organs Spider's main organs
Two main types of nerve cells. Two main types of nerve cells.
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
An angiogram that illustrates narrowing of the carotid artery (see arrow), the main pathway of blood ... An angiogram that illustrates narrowing of the carotid artery (see arrow), the main pathway of blood ...
Two ways of treating blocked coronary arteries, the main cause of heart attacks in older adults. Two ways of treating blocked coronary arteries, the main cause of heart attacks in older adults.
A taproot system consists of a large main root together with its lateral branchings A taproot system consists of a large main root together with its lateral branchings
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