Here's why:

* Organelles are specialized structures within a cell that perform specific functions.

* They are like tiny organs within the cell, each with a specific job to do.

* They work together to keep the cell alive and functioning.

Some examples of organelles and their functions include:

* Mitochondria: The powerhouses of the cell, responsible for energy production.

* Ribosomes: Sites of protein synthesis, building the cell's essential components.

* Endoplasmic Reticulum (ER): A network of membranes involved in protein and lipid synthesis, as well as detoxification.

* Golgi Apparatus: Modifies, sorts, and packages proteins and lipids.

* Lysosomes: The recycling centers of the cell, breaking down waste products.

So, while "organelles" is the correct term, you could also say "functional components" or "cellular machinery" to describe the working parts of a cell.