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There are more sensory neurons in the tongue than in any other part of the body.
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.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
In 1864, the first barbiturate (barbituric acid) was synthesized.
Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.
![Typical port fuel-injection system, indicating the location of various components. Notice that the ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_11_26_22_299951593.png)
![A multiport fuel injector. Notice that the fuel flows straight through and does not come in contact ...](https://biology-forums.com/gallery/30/medium_548020_30_05_17_11_26_28_30010736.png)