Depends on the type of surgery, the narcosis, the patient, and the postoperative medication. It can be hours, but might be days. Morphine and lookalikes tend to slow the digestive system down (though newer derivates should be better).
It does not take a long time, the mouth is the first part of the digestive system.
The human digestive system when stretched out end to end is about 30 feet long.
long
In the digestive system of a lion, the organs are 24 feet long. Food in their digestive system digests very quick, even meat.
30 feet.
its maybe 1 mile long
5 ft.
about 8 feet.
17 feet
5 feet
4.5 meters long
Approximately 30 feet.