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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.
There are more nerve cells in one human brain than there are stars in the Milky Way.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
![The Cordulegastridae are a family of Odonata (dragonflies) from the suborder Anisoptera. They are co](https://biology-forums.com/gallery/47/medium_12359_26_04_12_5_12_28.jpeg)
![Gomphidae is an Odonata family that contains about 90 genera and 900 species. They are commonly refe](https://biology-forums.com/gallery/47/medium_12359_26_04_12_5_13_53.jpeg)