Rebreathing systems are WE
D i.e. Mapleson F - Calcium hydroxide is the main component of both sodalime (94%) and baralimeQ (80%). - Ba(OH)2 is not a constituent of soda lime, it is used in baralime. Water (of crystalization) is used to produce hardening in baralimeQ. - Clayton, mimosaQ, ethyl violet, phenolphthalein & ethyl orange are indicators.
To & fro system
Circle system
Water's system
Mapleson F