The body form we have taken is only for this purpose. They came from one cell. All the cells then coordinate to sustain the body. We are all cells of the cosmic body to sustain it and to understand that we are nothing but the cosmos. No cell in the body is an unwanted cell.
Every cell has a purpose.
A cell in the heart is as important as the cell in brain or the liver or kidney. Cells just vary in their forms and functions. Basically they are all the same. This holds true for the cosmic body too. We are all important as the cells of the human body.