Make an argument. Which, if any, organ system(s) are the most important in keeping a person alive? Justify your answer.

All organ system(s) are important for proper functioning of the organism but I think Circulatory System is the most important one...!

Explanation:

Because the organism will die without proper blood circulation...!

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.