HUMAN NUTRITION

Detailed explanation-1: -All living things are composed of cells, and a group of cells form tissues. These tissues combine to form organs, and the organs form an organ system. The tissues perform simpler tasks, whereas the organs perform the complex functions of the body.

Detailed explanation-2: -Summarizing: The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism.