An indwelling "Foley" catheter is inserted into the bladder from:

The insertion of an indwelling "Foley" catheter occurs through the urethra, which is the correct pathway for this medical device. The purpose of a Foley catheter is to allow for the continuous drainage of urine from the bladder, and the urethra is the natural passageway that connects the bladder to the external environment.

Inserting a catheter through the urethra ensures that it can effectively reach the bladder while minimizing the risk of complications. Other options such as the intestine, rectum, or abdomen are not appropriate sites for Foley catheter insertion. These pathways serve different functions in the body and would not allow for the effective drainage of urine. In contrast, when inserted correctly through the urethra, the catheter can maintain a secure and sterile drainage system, which is critical for patient care and comfort.