Question

cell consists of many organelles yet we don't call any of the organelles structurall and functional unit of life. explain

Answer 1

we don't call that organelles as functional and structural as they alone are not sufficient t0 fulfill all their requirement. cell combines them all and makes a unit that is full n its own

Answer 2

Because some primitive unicellular prokaryotic organism's cell's lack (some or more) organells and yet they survive.
Another reason is cell contains many organelles and we cannot particularly say that "this organelle is important" because all organelles are important. In order to specify the importance of all organelles we use the word commonly as "cell" and hence cell is the structural and functional unit of life.
This is a brilliant question.