which lists three living units of the human body in order from the simplest to the most complex level of…
which lists three living units of the human body in order from the simplest to the most complex level of organization?\nred blood cell → circulatory system → blood\nnervous system → nerves → brain\nred blood cell → heart tissue → circulatory system\nbone tissue → skeletal system → bone
Answer
Brief Explanations:
The levels of organization in the human body from simplest to most complex are: cell → tissue → organ → organ system.
- For the first option: Blood is a tissue, and the circulatory system is an organ system. But the order “red blood cell → circulatory system → blood” is wrong as blood (tissue) should come before the circulatory system (organ system).
- For the second option: The nervous system is an organ system, nerves are organs, and the brain is an organ. The order “nervous system → nerves → brain” is incorrect as it goes from more complex to less complex.
- For the third option: A red - blood cell is a cell, heart tissue is a tissue, and the circulatory system is an organ system. This follows the cell → tissue → organ system order.
- For the fourth option: Bone tissue is a tissue, the skeletal system is an organ system, and a bone is an organ. The order “bone tissue → skeletal system → bone” is wrong as bone (organ) should come before the skeletal system (organ system).
Answer:
red blood cell → heart tissue → circulatory system