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.
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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
Properties of Ammonia
Reactions in assimilation of ammonia and major fates of the fixed nitrogen
Transport of ammonia to the liver for urea synthesis
Catabolism of uric acid to ammonia and CO2
A sample of baking soda is heated and releases carbon dioxide gas into a 1000-mL