Our skeleton is kind of strange. Most of it forms from the same tissue that makes things like our muscle and connective tissue. The exception is a big chunk of our face, like the jaws and nasal ...

The sympathetic nervous system, which helps your heart and other vital organs function all the time, increases activity in response to danger or stress, preparing the body for extra demands. Stress is ...

Each part of the nervous system uses internal checks and balances to regulate its activity, responding to various factors like mood, health status, and the external environment.¹ These regulatory ...

Your sympathetic nervous system is one of the branches of your autonomic nervous system. It controls functions under unconscious control related to “fight or flight.” Your nervous system plays a ...