The answer is <span>nitrogen
hope it helps </span>
D.a protein that attacks foreign molecules
D because your calf muscle is under your knee in back to if it’s already built up and can go to the heel bone because the calf muscle is connected to the heel bone
Answer:
1. Without it, you could make no new cells. The cells in most of your body would wear out very quickly, greatly shortening your life.
2. No cell growth, no cell reproduction
3. DNA or genetic material would not be able to be passed on.
Explanation:
It would be the endocrine system
