It helps people survive and live a normal life.
The most important system in the upper and lower body is the Circultory System
immune system
Respiration
The hagoo system
it is important because your thing is cool
the nerve system is important b/c it controls all the thins in the body!!!!!!!
The least important system in the body is arguably the scalp hair. It only serves as a means to look good and to attract the other sex.
It's the system that helps carry oxygen into our body's and we need oxygen in our body
its transports nutrients to the body and take waste out
Really, everything in your body plays an important role.
The 4 important systems of the human body is the skeletal system, digestive system, muscular system and circulatory system.
because it helps your body