|
|
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.
The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.
Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
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.
![This young boy with muscular dystrophy needs to receive tube feedings and home nursing care. He atte](https://biology-forums.com/gallery/47/medium_14755_30_09_12_4_32_25_9134396.jpeg)
![Listening to loud music with headphones or at rock concerts is a frequent cause of hearing loss amon](https://biology-forums.com/gallery/47/medium_14755_07_10_12_3_29_40_93491848.jpeg)