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There are more nerve cells in one human brain than there are stars in the Milky Way.
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.
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.
Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.
![Patients should be encouraged to bring to their health care visit all the substances that they take,](https://biology-forums.com/gallery/47/medium_18099_13_09_12_10_00_26.jpeg)
![A schematic representation of the convergence of cones and rods on retinal ganglion cells. There is ...](https://biology-forums.com/gallery/30/medium_548020_05_06_17_11_21_54_3029189.png)