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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
There are more nerve cells in one human brain than there are stars in the Milky Way.
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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.
![Nurses may collaborate with social workers, physicians, and other members of the health care team to](https://biology-forums.com/gallery/47/medium_2137_17_05_12_1_52_57.jpeg)
![The medical assistant often has to reassure and comfort the patient before effective communication c](https://biology-forums.com/gallery/47/medium_380792_21_05_16_2_07_16_235561803.jpeg)