AS Biology Cell organisation

cells come in many different forms and can be organised in different ways

a tissue is a group of similar cells working together to perform a function

an organ is a group of tissues working together to perform  a function

a system like the digestive system is a group of organs working together to perform a function in the body

the organisum is the thing which has all of these systems and in this case it would be a multicellular organism because it has been able to adapt and specialize