Ficheiro:Cell types.png

Summary

Eukaryotes and prokaryotes.

This figure illustrates a typical human cell (eukaryote) and a typical bacterium (prokaryote). The drawing on the left highlights the internal structures of eukaryotic cells, including the nucleus (light blue), the nucleolus (intermediate blue), mitochondria (orange), and ribosomes (dark blue). The drawing on the right demonstrates how bacterial DNA is housed in a structure called the nucleoid (very light blue), as well as other structures normally found in a prokaryotic cell, including the cell membrane (black), the cell wall (intermediate blue), the capsule (orange), ribosomes (dark blue), and a flagellum (also black).

Copyright status

This image is public domain because it was first published by the National Institutes of Health

Source

http://www.ncbi.nlm.nih.gov/About/primer/genetics_cell.html