Which lists three units of an organ system in order from the simplest to the most complex? red blood cell → heart → tissue skeleton → bone → bone cell muscle cell → muscle tissue → stomach lung tissue → lung → circulatory system

The correct answer is muscle cell → muscle tissue → stomach lung tissue → lung → circulatory system.The organization of human body starts from the simplest level and ends at the complex level. It starts from cell tissuesorgan organ system m 1 body. The cell is known as the basic structural and functional unit of life. Then the cells combine to form tissue and the tissues combinely form organ system.