A complete tool for understanding the structure of the prokaryotic cell. This item, greatly enlarged, is composed of four models on the same base: A cross-section of a general prokaryotic cell, illustrating typical structures as pili, flagella, inclusion body, plasmides and chromosome Two schematic representations of the cell wall of Gram-negative and Gram-positive bacteria A model of spore, partially cut away to show all its different layers, from the exosporium to the cytoplasmatic membrane. All the main structures, shown in minute detail, are numbered and referenced on the included k-card.