Self-Sustaining Chemical Systems:
Eucaryotes evolved more
recently than procaryotes, and they obviously represent a higher
level of organization.
More specialization is seen within the cell, and there is more compartmentalization
of the cell chemistry. Listed in the table below are eleven major
components of a eucaryotic cell, which includes plant as well as
animal cells. The photomicrograph on Page 1 shows a typical animal
cell - a secretory cell from the pancreas of a bat.
In the schematic drawing to the side, labels indicate major features
that are visible in the chapter-opening photomicrograph.
The round dark objects, called zymogen granules, contain enzymes
packaged for export from the cell.