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:
... racial makeup of the village is 98.38% White, 0.40% African American, 0.00% Native American, 0.67% Asian, 0.00% Pacific Islander, 0.00% from other races, and 0.54% from ...