|
|
There are more sensory neurons in the tongue than in any other part of the body.
Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
Thyroid conditions may make getting pregnant impossible.
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.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
![Filter in the vena cava prevents an embolus from traveling to the heart, lungs, or brain; A, Greenfi](https://biology-forums.com/gallery/47/medium_18099_24_10_12_3_18_58.jpeg)
![Some playgrounds near streets with heavy traffic may still have high levels of lead from gasoline ...](https://biology-forums.com/gallery/47/medium_667187_21_02_17_5_23_24_256091816.png)