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  1. Allergens, like pollen, are nothing more than foreign plant antigens. When they get released into the air, you can see and hear the result.When allergens ...
  2. Skip navigation An official website of the United States government Here’s how you know Here’s how you know Official websites use .gov A .gov website belongs ...
  3. A plaque is an abnormal cluster of protein fragments. Such clusters can be found between nerve cells in the brain of someone with Alzheimer. A microscope ...
  4. Health Videos: MedlinePlus Video (National Library of Medicine)  
    Skip navigation An official website of the United States government Here’s how you know Here’s how you know Official websites use .gov A .gov website belongs ...
  5. A change in the heart’s normal electrical conduction system can result in an arrhythmia, or irregular heartbeat. An arrhythmia can be an abnormally slow ...
  6. Blood Transfusions (For Teens) Video (Nemours Foundation)  
  7. Athetosis is a condition marked by constant writhing movements. It's often caused by injury to basal ganglia. These are structures found deep within the ...
  8. Coping with Traumatic Events Video From the National Institutes of Health (National Institute of Mental Health)  
    Skip to main content Transforming the understanding and treatment of mental illnesses. Search the NIMH Website: Información en español Celebrating 75 Years! ...
  9. Balloon angioplasty is a procedure used to open narrowed or blocked arteries. It uses a balloon attached to a catheter that's inserted into an artery. ...
  10. What Is Asthma? Video (Nemours Foundation)  
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