The behavior of cells provides a pattern for organizational growth that is, as far as I can tell, unrivaled.
When a cell reaches a certain size, it naturally splits in two. There are no meetings, no bureaucratic stages of approval. The brain does not need to sign off on the activity of cell division.
Yet, despite this split, the synergy between cells remains in tact. Tissues form through a common structure, composition and function, just like teams within an organization.
And this synergy extends beyond tissues. Regardless of how much cells split and multiply, they coordinate to form organs and organs in turn harmonize with one another to form systems.
Despite the complex relational harmony of the cell with its neighbors, it retains a distinct cell membrane of separation to limit the kinds and levels of interaction that can take place between the internal and external environments.
We need more teams that imitate animal cells. We should strive to imitate their delicate balance of preserving the distinctness of the parts with the unity of the whole.
Without walls providing a degree of insulation, we lose drive, team camaraderie, focus, and that distinct inertia that happens when collaboration is free to happen through face-to-face personal relationships.
With such a balance in the internal hierarchy of cell life, it's no wonder we see such incredible examples of delicate order and spontaneity in nature. See more drawings from Haeckel: http://bit.ly/HaeckelFlickr
*Most of the ideas expressed in this post are probably not original. I am not aware of any commentary on the significance of the cell membrane and its analogical application to organizations. I owe Richard Nutley thanks and credit for drawing my attention to the importance of cities with walls. Christopher Alexander has pointed out the significance in architectural design of barriers and transition areas in A Pattern Language