Because it is mainly concerned with absorption of interstitial fluid from the tissues.
Correct Answer: fertilizer running off from a large agricultural farm
Your body systems work together to keep you alive. Each of these systems is made up of organs
with specific functions. The structure of these organs and the cells of which they are made make
them well suited to their function. An important function of your body systems is to supply your cells
with energy and nutrients, and to remove wastes that are produced, thats the best I
have.
All of the above is the answer!
