What does a cystoscopy allow healthcare providers to visualize?

A cystoscopy is a medical procedure that uses a thin tube with a camera, known as a cystoscope, to visualize the interior of the bladder and urethra. This allows healthcare providers to examine these structures for abnormalities, such as tumors, infections, or blockages. Therefore, the correct answer highlights the specific areas that are directly visualized during a cystoscopy.

The other options refer to different parts of the body that are not examined during this specific procedure. The heart and lungs are assessed with different imaging techniques such as echocardiograms or chest X-rays. The stomach and intestines are evaluated through procedures like endoscopy or colonoscopy, while the kidneys and ureters would typically require imaging studies such as ultrasound or CT scans, as they are not directly accessed via a cystoscope, which is specifically designed for the lower urinary tract.