* Heterogeneous means a system composed of multiple distinct components with different properties.

* Homogeneous means a system with a uniform composition throughout.

Cells have many distinct components, each with different properties:

* Membranes: The cell membrane and internal membranes (like the endoplasmic reticulum and Golgi apparatus) are composed of lipids and proteins.

* Cytoplasm: The gel-like substance that fills the cell contains water, proteins, carbohydrates, and other molecules.

* Organelles: Cells contain various organelles (like the nucleus, mitochondria, and chloroplasts) with specialized structures and functions.

* Inclusions: Cells can have non-living structures like storage granules or pigment granules.

Therefore, the diverse components and their distinct properties make a cell a heterogeneous system.