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• Eyes for Parents

  
  

  The eyes are small compared with most of the body's other organs, but their structure is incredibly complex. Learn more about eyes, vision, and common problems with both.

• Eyes for Teens

  
  

  Although your eyes are small, their structure is incredibly complex. Find out how they work in this body basics article.

• Endocrine System for Parents

  
  

  The glands of the endocrine system and the hormones they release affect almost every cell, organ, and function of our bodies.

• Endocrine System for Teens

  
  

  The endocrine system influences almost every cell, organ, and function of our bodies. It is instrumental in regulating mood, growth and development, metabolism, and sexual function, among other things.

• Toxoplasmosis for Parents

  
  

  Toxoplasmosis is an infection that passes from animals to humans, sometimes without causing any symptoms. Learn more about this infection in this article for parents.

• Female Reproductive System for Teens

  
  

  Why do girls get periods? What goes on when a woman gets pregnant? What can go wrong with the female reproductive system? Find the answers to these questions and more in this article for teens.

• Your Skin for Kids

  
  

  No matter how you think of it, your skin is very important. It covers and protects everything inside your body.

• Late Effects of Cancer and Cancer Treatment for Parents

  
  

  Long-term side effects, or late effects, happen to many cancer survivors. With early diagnosis and proper follow-up care, most late effects can be treated or cured.

• A to Z: Hydrocephalus for Parents

  
  

  Hydrocephalus (sometimes called "water on the brain") is a brain condition that happens when cerebral spinal fluid (CSF) is unable to drain from the brain.

• Auditory Neuropathy Spectrum Disorder (ANSD) for Parents

  
  

  Some kids have hearing loss due to auditory neuropathy spectrum disorder (ANSD), a problem in the transmission of sound from the inner ear to the brain.