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Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.
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.
The human body produces and destroys 15 million blood cells every second.
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.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
![Photosynthetically active radiation (PAR) diminishes substantially with passage through the canopy o](https://biology-forums.com/gallery/47/medium_33_09_09_11_10_14_55_17071329.jpeg)
![The grand opening of the huge Miraflores lock on the Panama Canal in October, 1914. The locks were b](https://biology-forums.com/gallery/47/medium_6_02_03_16_7_45_22_234071402.jpeg)