Ultrastructure (or ultra-structure) is the detailed structure of a biological specimen, such as a cell, tissue, or organ, that can be observed by electron microscopy; the cellular structures that are too small to be seen with an optical microscope.
Ultrastructure (or ultra-structure) is the detailed structure of a biological specimen. This is such as a cell, tissue, or organ,; the cellular structures. These cellular structures are too small to be seen with an optical microscope. This cell can be observed by electron microscopy. This cell is tissue. This cell is organ.