The sympathetic nervous system controls the body's flight or fight mechanism. Learn about its vital functions, & how it regulates bodily processes.

The endocrine system produces hormones in the body. Learn more about the glands in this system and the types of endocrine disorders and conditions.

Learn about the sympathetic nervous system, a branch of the autonomic nervous system that controls functions related to "fight or flight." ...

Learn about the autonomic nervous system. Discover different health problems and symptoms that can affect this system.

Glial cells play an important role in supporting the body's nervous system. Several types of glial cells exist. Learn more here.

Everything You Wanted to Know About the Longest Nerve in the Body Like a highway system, the vagus nerve branches profusely from your brain through your organs to marshal bodily functions ...

The genitourinary system combines the many working parts of the urinary and reproductive systems, which are closely connected.

Once activated in one part of the body, the adaptive system functions throughout, and it memorizes the antigens (a substance that provokes an immune system response).