|
|
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.
GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.
HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.
Blood is approximately twice as thick as water because of the cells and other components found in it.
![The sea urchin Diadema on a coral reef. Feeding by Diadema appears to play a key role in the interac](https://biology-forums.com/gallery/47/medium_33_28_08_11_12_16_04_1592505.jpeg)
![Women have the role of kinkeeper in almost all cultures. This may cause them to react to stress by ...](https://biology-forums.com/gallery/27/medium_660366_08_04_17_10_05_19_275551409.jpeg)