What organoid regulates cell activity?

The nucleus is an organelle found in most eukaryotic cells, with the exception of red blood cells. In animal cells, it is the largest and most rigid organelle and is easily identified with a light microscope. The average mammalian nucleus has a diameter of ~ 6 μm and occupies about 10% of the total cell volume. The primary functions of the nucleus are to store the cell’s DNA, maintain its integrity, and facilitate its transcription and replication. The nuclear contents, which include genetic material and many of the proteins required to process it, are enclosed in a double membrane known as the nuclear envelope, but functionally linked to the cytoplasm through nuclear pores.