Cytoplasm is the gel-like substance that fills the space between the cell membrane and the nucleus. It's essentially the "stuff" that all the other organelles are suspended in.

Here's why it's found in both:

* Fundamental to life: Cytoplasm plays a crucial role in many essential cell processes, like:

* Metabolic reactions: Many chemical reactions take place within the cytoplasm.

* Transport: It acts as a medium for the movement of molecules and organelles.

* Structure: It provides a framework for the cell and helps maintain its shape.

Since these functions are fundamental to all living cells, both plant and animal cells need cytoplasm to survive.