Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Major parts of a cell.
Plant Cell
Diagram of a cell
A prokaryotic cell
An example of a cell-mediated immune response targeting virus-infected cells.