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.
When to send out wedding invitations. Invitations have traditionally gone out six to eight weeks before the wedding. We'd advise starting the process of getting them ready about four months in advance to make sure you account for DIY time, addressing time, handling special envelopes, or other circumstances.