In anatomy and physiology, the organism level is the highest level of organization. An organism is a living thing with a cellular structure that can independently perform all the physiological functions necessary for life.
The organism level is the most complex level of organization. It encompasses all the other levels of organization, including organs, tissues, cells, and organelles.
Here is how the levels of organization build up:
Cells: Group together to form tissues
Tissues: Group together to form organs
Organs: Group together to form organ systems
Organ systems: Group together to form an organism
