Groups of cells that work together are called tissues.
grassroots
It is called a system.
It is called an iron triangle.
Connective tissue holds other tissues together.
Tissues that work together is called an organ
When both parties work together this is called bipartisanship.
When animals work together, (i.e: hunting) it is usually called 'pack mentality'
team work
Tissues that work together is called an organ
The organs that are responsible to do the work or to function together are called an organ system.
When both parties work together this is called bipartisanship.
Groups of people or countries that work together are called Alliance
Organs
When simple machines work together, that forms a compound machine.
These are called Organisms.
It is called a compound machine.