Organisms can be made up of many , which could be arranged into , which can make up , organs can be part of an . These are ___ . Please help!!!

Organisms can be made up of many cells, which could be arranged into tissues which can make up organs, organs can be part of a(n) system. These arei don't really know after this since you didn't give a lot to work with and i'm not even sure if this is right or not lol.

sex cells are usually half's then they find another half and make a fertilize egg