A Stem Cell is defined as a cell capable of giving rise to other cell types. Pluripotent cells can give rise to any cell type; restricted adult stem cells can produce cells in the tissue from which they are derived.
Organoids can be grown from the two main types of stem cells:
(1) pluripotent embryonic stem (ES) cells which can be induced to produce any tissue
(2) organ-restricted adult stem cells
Both cell types exploit the seemingly infinite expansion potential of normal stem cells in culture.