Which of the following best describes catheterization?
a. Burning away of cancerous tissue
b. Visualization of the large intestine
c. Implantation of an intrauterine birth control device
d. Placement of a drainage tube into the bladder
The correct answer would be D. Catheters typically enter through either the stomach or the urethra and serve the purpose of draining urine for people who may be unable to naturally do so.