|
|
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
![The humoral and cellular immune response. At the left is the humoral (or B-cell mediated); at the ...](https://biology-forums.com/gallery/31/medium_398119_11_07_17_2_55_16_31469209.jpeg)
![A dose-response curve describes the relationship between the quantity of the chemical entering the ...](https://biology-forums.com/gallery/33/medium_380798_24_08_17_3_39_50_33669297.jpeg)