Question

What are the four levels of organization in the human body from the lowest level to highest level?

A.
cells → organs → tissues → body systems

B.
cells → tissues → organelles → organ systems

C.
cells → tissues → organs → organ systems

D.
cells → organelles → tissues → organ systems

Answer 1

C. cells → tissues → organs → organ systems

This is the standard sequence (from cellular up). (Full hierarchy often shown is chemical/molecular → cellular → tissue → organ → organ system → organism.)