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:
... of the town is 89.99% White, 4.23% African American, 0.97% Native American, 0.97% Asian, 0.00% Pacific Islander, 2.17% from other races, and 1.66% from two or mo ...