So how does the Endocannabinoid System (ECS) in our bodies work? To understand this, we first have to understand some basics about cells and cell-to-cell communications.

Cells

A cell is the smallest unit of life. Cells are often called the "building blocks of life." Our bodies are comprised of trillions and trillions of different cells, approximately 32.7 trillion cells in all, of more than 200 different types. 

Cells Cluster

Each cell has a particular function to perform. At the same time, however, cells cluster to form tissues, organs, and body systems, where they work together with other cells to serve larger functions (see Figure 1)

Figure 1: Cell Clusters