cell -> organ -> tissue -> organ system organ system -> cell -> tissue -> organ tissue -> organ -> organ system -> cell cell -> tissue -> organ -> organ system
I gave my students this multiple choice question: Which sequence identifies the levels of organization of body structures in a human from simplest to most complex?

Only one answer is correct among these 4 choices:
- cell -> organ -> tissue -> organ system
- organ system -> cell -> tissue -> organ
- tissue -> organ -> organ system -> cell
- cell -> tissue -> organ -> organ system

Could you tell me which one is correct?

cell -> tissue -> organ -> organ system