In the resource titled, “Levels of Organization,” you learned about the levels of organization in multicellular organisms. These levels increase in complexity, starting with the cell.

In this resource, you will focus on the organ systems that make up the human body. An organ system is a group of organs that work together to carry out a broad set of functions for the organism. Organ systems help to maintain homeostasis in organisms.

Watch this video for a brief overview of the eleven human organ systems.