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 cells, tissues, organs, and organ - systems. A red blood cell is a cell, heart tissue is a tissue, and the circulatory system is an organ - system.
Answer:
red blood cell → heart tissue → circulatory system