When animals have tissues they also have organs Why are thes

When animals have tissues, they also have organs. Why are these two evolutionary developments correlated?

Solution

Living organisms are broadly divided into unicellular and multicellular..

Unicellular organisms have a single cell to regulate their entire activities...Whereas multicellular organisms have groups of cells among which similar cells get organised into tissues...And similar tissues get organised to form organs...And organs of similar function make up an organ system..! A single totipotent cell differentiates into wide variety of cells...Which then have the capacity to get compiled together as tissues and organs