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There are more sensory neurons in the tongue than in any other part of the body.
Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
![Leafcutter ants carrying leaf fragments back to the nest where they will be processed to create a su](https://biology-forums.com/gallery/47/medium_33_09_09_11_10_15_38_1724111.jpeg)
![In a craniotomy, a portion of the skull and overlying scalp is pulled back to allow access to the br](https://biology-forums.com/gallery/47/medium_14755_07_10_12_3_19_34_9330731.jpeg)