Hey there, 3 types of organelles are Rough Endoplasmic Reticulum, Smooth Endoplasmic Reticulum, and Mitochondria. The Rough Endoplasmic Reticulum it's density is higher near the nucles. The Smooth Endoplasmic Reticulum is an organelle that's in an animal cell and plant cells. The Mitochondria is an organelle that is found in large numbers in most cells.
