cell -> tissue -> organ -> organ system tissue -> organ -> cell -> organ system organ system -> organ -> cell -> tissue cell -> organ -> tissue -> organ system
I gave my students this multiple choice question: Which sequence represents the correct levels of organization for multicellular organisms?

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

Could you tell me which one is correct?

cell -> tissue -> organ -> organ system