Organize the parts of this body system in the CORRECT order according to the levels of organization in a multicellular organism, simplest to most complex..
If you are referring to levels of biological organization, then lets start by talking about he different levels from simplest to most complex.
Cells: This is the simplest and building blocks of life. Tissues: It is a group of cells that work together and serve a specific function. Organs: It is a group of tissues that work together and serve a specific function. Organ System: Is a group of organs that work together to do a specific biological process. Organism: This is a living organism that is composed of organ systems that function together.
There are other levels but your question refers to a multi-cellular organism, so we will stop there. Here is an example, which might also be the question you are referring to:
Neurons - nerve tissue - brain - central nervous system - human being Cell Tissue Organ Organ System Organism
