Prokaryotes include the kingdoms of Monera (simple bacteria) and Archaea. At a basic level a prokaryote is an aqueous emulsion containing biomolecules and other substances surrounded by a membrane and a cell wall. Prokaryotic cells don't possess membrane bound organelles. Of course things are never that simple in biology. At least some prokaryotes do contain intracellular structures that can be seen as primitive organelles. Intracellular membranes are known in some groups of prokaryotes, such as membrane systems devoted to special metabolic properties.
For the future doctor, prokaryotes are an important subject of study given that many infectious diseases arise from bacterial infection. In addition to an awareness of the structural features of bacterial cells, you should have a good basic sense of morphological classification in bacteria, modes of reproduction and DNA transfer, and an understanding of sociality in bacteria and patterns of interacting with the environment.
The Prokaryotic Cell Images
Conceptual Vocabulary Self-Test
Basic Terms Crossword Puzzle
Basic Puzzle Solution
Conceptual Vocabulary for Prokaryotes