The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.
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In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.
Respiratory system of a bird.
Divisions of the nervous system
The cardiac conduction system.
Effects of the Autonomic Nervous System
Development of the Digestive System "تطوير الجهاز الهضمي"