subcellular organelles are organelles contained that are contained within a cell. Each one has a specific structure that corresponds with its function.
One example is the Golgi Apparatus which has a structure resembling bags or balls. This helps it serve out its function as the shipping and sorting center of the cell. One end acts as a receiving point and the other acts as a shipping center while the middle sorts.
Rough Endoplasmic Reticulum's membrane is covered in ribosomes, perfect for its function of making proteins. etc.
