Respiration
The most important system in the upper and lower body is the Circultory System
The hagoo system
Your skeletal system is one of the most important systems in your body. It is the foundation for your body and if you didn't have it, your body would be a pile of flesh and guts.
OXYGEN
Your breathing system plus the heart edf
The Bicarbonate Buffer System
No you idiots the nervous system is it controls everything in the body ding-dong
More than two do: 1. the integumentry system (skin) 2. the urinary system * 3. the respiratory system * 4. the digestive system * most important
The visceral part, also known as the autonomic nervous system.
immune system
Every system in the human body is ineteresting and extremely important. Although all of the systems are seperate, they all work together to make your body run. Without any of the systems, you would not be alive.
it protects the internal organs of the body.