List three cell parts that are probably present in the cell, but too small to be seen with your light microscope. What are the functions of...

Ribosomes are present on all cells, but are very small and
unlikely to be seen with a standard light microscope; at best, they may look like tiny
grains, but their structure will not be discernible. Ribosomes are found both free in
the cytoplasm and embedded on the surface of the rough endoplasmic reticulum. They are
involved in protein synthesis.

Vesicles are generally
small, and often are clear, so are not likely to be visible under the light microscope.
They are involved in the transport of materials, both within the cell and across the
cell membrane.

Cytoplasm is present in all cells, but you
can't really see it, you actually look through it to see the other parts of the cell. It
is a clear watery fluid, and provides support and transport within the
cell.

The cytoskeleton is a network of fibers and tubes
that provides internal support and shape to the cell.These are very fine and usually are
not visible unless the cell is in the midst of
mitosis.

Peroxisomes and lysosomes are very tiny membrane
sacs filled with enzymes that help the cell break down materials. Peroxisomes break down
toxins and lysosomes break down things the cell has ingested.  Both are quite tiny and
probably not visible with a standard light microscope.