It often relieves hunger, by arresting the secretion of gastric j uice and the movements of the stomach and bowel,'* and it frequently upsets digestion from the same cause.
T, tentacle; g.p, gastric pouch; r.c, radial canal not present in C and C'; c.c, circular or ring-canal; e.1, endoderm-lamella formed by concrescence.
In medicine copper sulphate was employed as an emetic, but its employment for this purpose is now very rare, as it is exceedingly depressant, and if it fails to act, may seriously damage the gastric mucous membrane.
It is used in the treatment of haemoptysis in the form of a fine spray, or taken internally it will check gastric haemorrhage.
The object of taking no liquid with meals is that it ensures mastication being more complete, because persons cannot wash the unmasticated food down by drinking, and it prevents the gastric juice from being greatly diluted, and so allows it to digest more rapidly.