an organ system is a group of organs that work together for a common function. the order goes cells, tissues, organs, organ systems, organism.
Genetics or lifestyle. Meaning tobacco use, etc.
The body already produces enough protein to get by just fine. However, many people think athletes "use up" too much protein and faster than they gain it back, but that is not true because the body regulates homeostasis. I hope I helped :)
1 :an abnormal pouch<span> or sac opening from a </span>hollow organ<span> (as the colon or bladder)
2 :a blind tube or sac </span>branching<span> off from a cavity or canal of the body. the liver is an anterior diverticulum of the intestine.</span>
