|
|
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.
Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.
There are more bacteria in your mouth than there are people in the world.
![Some mangrove islands in the Florida Keys, which number in the thousands, are convenient places to t](https://biology-forums.com/gallery/47/medium_33_19_02_12_5_42_32_20702454.jpeg)
![This girl ran four spinning machines in a cotton mill in Whitnel, North Carolina. Only 4 feet, 3 inc](https://biology-forums.com/gallery/47/medium_6_24_08_15_12_36_52_224172425.jpeg)