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

This system controls the body processes that occur at rest. It regulates the everyday functions of body systems under relatively stable conditions, Giordano told Live Science.

Digestion and breathing may seem unrelated, but they are intimately connected. Here's how they work together to support health.

In addition, the integumentary system performs important immune functions, cell fluid maintenance, synthesis of Vitamin D, body temperature regulation, and detection of stimuli.

Functions: What Does the Endocrine System Do? The key responsibility of your endocrine system is to create and release hormones into the bloodstream while monitoring their levels throughout your body.

Cystic fibrosis causes your body to develop thicker mucus than normal, and this degrades the functions of many of the body's systems.