Semantics

У меня болит желудок. I have a stomach ache.
This entry is concerned with the use of the word желудок to refer to human and animal stomachs as part of the digestive system. The word желудок is also used metaphorically to refer to the physical, as distinct from intellectual, spiritual, etc., part of the human condition, e.g.
Человек — раб своего желудка. Man is a slave to his stomach.