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Author Question: Many companies sell software, music, or digital photographs over the Internet. They provide each ... (Read 95 times) |
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Blood is approximately twice as thick as water because of the cells and other components found in it.
More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.