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.
Did you know?
There are more bacteria in your mouth than there are people in the world.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
NURSE
NUrse
A nurse prepares a client for anesthesia and surgery.
Hubba Hubba Nurse Smiley
Nurse opens sterile package
Models of Selective Attention in the Dichotic Listening Task