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Organelle

In biology, particularly cell biology, the term organelle is used to describe any one of a number of types of subcellular structures, historically identified through the use of some form of microscopy.

A few large organelles probably originated from endosymbiont bacteria:

chloroplast
mitochondrion

Other organelles include:

endoplasmic reticulum
golgi apparatus
lysosome
nucleus
peroxisome
vacuole
vesicle

Other related structures:

flagellum
ribosome
cytosol
endomembrane system
nucleosome

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