The main responsibility of the endocrine system is to regulate the body's growth and development, so I think your answer would be "create growth spurts in teen boys"
Hope this helps!
For them to understand and listen to seach others ideas.
No because what ever the cell is it can only make that type of cell Ex: liver cells can only make liver cells and brain cells can only make brain cells.
Answer: I got a second chance because I was framed of something I didn't do. I explained it and I got a second chance. I am really grateful that they listened and believed me.