Cells are sometimes called the basic unit of biological life. When working properly, they’re composed of a community of interdependent structures functioning as a coherent whole. Although the individual parts within a cell perform different tasks, they’re also interdependently connected to each other by way of a shared and unified purpose toward nourishing and or defending the whole cellular system as a coherent community.
This principle of coherent structures that involves differentiated tasks connected by way of a shared purpose for nourishment and defense in the context of a larger community does not stop at the boundary of individual cells. Organs and systems such as the immune system are also arranged as coherent entities with specialized capabilities that are connected by way of a mutually dependent unified purpose. We also see this same community principle in the shared relationships between many other biological life forms such as bacteria, plants and the environment as a whole body of life. Without this web of relationships, our biological form breaks down.
Like any social network, the cooperative bonds that form a coherent biological society rely on this story of differentiated roles bound together by mutual dependence – a story that is retold over and over on many levels. The stories involve the sacrificial heroes in that nobly put the needs of the community above their individual needs. Along with these “brave defenders” we also see inventors, and a host of other roles that might be considered more mundane, but are no less vital to the continuing coherence of the community at large.
Here is a closeup of one of these many stories; the story of a sacrificial hero, that works together with one of the more mundane players. The hero, a soldier called a neutrophil that works together sanitation engineer called a macrophage – each needing to play their vital roles in the context of the larger community to maintain the integrity of the biological system we depend on for life.