The main types of<unk>  systems are: * The Classic chamber system (as designed by<unk> . * The Self-contained chamber system (the full apparatus within a single block) * The Multi-channel chamber system (2 to 24 independent chambers combined)
Ussing chamber
Cooling center
Drip chamber
Diving chamber
Optic cup 
Layer of rods and cones
Fluid compartments
Neuroeffector junction