cells -> organs -> organ system -> tissue cells -> tissue -> organs -> organ system tissue -> cells -> organ system -> organs tissue -> organ system -> cells -> organs
I gave my students this multiple choice question: Which series correctly represents the levels of organization in an organism?

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

Could you tell me which one is correct?

cells -> tissue -> organs -> organ system