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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.
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.
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
![Human embryonic stem cells stained with Tra-1-60 (green) - a stem cell marker and nestin (red), a ne](https://biology-forums.com/gallery/47/medium_71476_01_04_13_3_28_35.jpeg)
![The integumentary and nervous systems work together to recognize specific sensations, such as heat ...](https://biology-forums.com/gallery/47/medium_665046_01_03_17_6_26_23_261232101.jpeg)