The organelle inside the nucleus that makes ribosomes is called the nucleolus.

Here's a breakdown:

* Nucleus: The control center of the cell, containing the cell's DNA.

* Nucleolus: A dense region within the nucleus where ribosomal RNA (rRNA) is synthesized and assembled with proteins to form ribosomal subunits.

* Ribosomes: Tiny organelles that are responsible for protein synthesis.

The nucleolus is essential for the production of ribosomes, which are crucial for the cell's ability to make proteins.