Describe the physiology of digestion in cockroach .

Explanation

Food collection : Cockroach is an omnivorous insect . It feed on all of organic matter
Digestion : After shallowing , the food passes through the pharynx and oesophagus and reaches the crop . In the crop , food is mixed with digestive juices that are regurgitated into it through the grooves of the gizzard . Hence , most of the food is digested in the crop . The partly digested food is filtered by the bristtes of the gizzard and later it passes through the stomodeal valve into the ventriculers .
The enzyme amylase of the salivary juice converts starches into disaccharides . invertase or sucrase digests sucrose into glucose and fructose Maltose converts maltose into glucose . The enzyme lipase digests lipids into fatty acids and glycerol Proteases digest proteins into fatty acids and glycerol . poteases digest proteins into aminoacids Cellulose of the food is digested by the enzyme cellulose secreted by the microorganisms present in the hindgut of cockroach . Cellulose is converted into glucose .
In the ventriculus , the digested food is absorbed . The undigested food is passed into the ileum, colon and then reaches the rectum , where water is reabsorbed by rectal papillae . Then the remaining material is finally defeacated as dry pellets , through the ansu.