Hormonal system
The endocrine (hormonal) system influences your metabolism, growth and other functions. Learn more about what it is and related conditions.
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Anatomy
The human body has many different systems and organs that all serve different function. Learn more about the brain, heart, digestive system and other parts of the body.
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Immune system
Your body's immune system is designed to protect you from, or get rid of, infection. Learn more about how the immune system works.
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Nervous system
Your nervous system controls many of your body’s functions, including walking, speaking and other activities. Learn more about how it works.
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Central nervous system (CNS)
Your central nervous system (CNS) is made up of your brain and your spinal cord. Learn more about its role and the different parts of the brain.
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Respiratory system
Your respiratory system brings oxygen into your body and helps to remove carbon dioxide. Learn more about how it functions, how to keep it healthy, and related conditions.
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Circulatory system
The circulatory system includes the blood, heart and blood vessels. It moves oxygen and nutrients around the body and removes carbon dioxide to help keep your body cells healthy.
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Throat diseases
Your throat is part of your respiratory and digestive systems. Learn how to manage conditions that affect it, such as strep throat and colds.
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Autoimmune conditions
Autoimmune diseases strike when the immune system attacks healthy cells in the body. Read about the causes, symptoms and treatment options.
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Nervous system diseases
Find out more about specific nervous system diseases, including signs and symptoms of particular conditions, how they are diagnosed and where to go for support.
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