Much of this movement is to regulate the contents of the cell. This includes bringing material into the cell from the extracellular environment or the plasma membrane (endocytosis) or releasing material made within the the cell to the outside (exocytosis).
It really is an easy project...it just takes a little time. All and all, it took me about 6-8 total hours to make 4 bouquets, 10 bouts (my mom made those though) and about 15 centerpieces. I made two bouquets the day before our wedding and the other two the day of the wedding.
Begin looking for your wedding bands at least two months before your wedding date. This gives you time to browse and revisit rings that catch your eye. (Browsing is an important part of the process. Don't skip this step and buy the first thing you see.) Allow even more time if you're interested in a custom piece.