Ultrasound is the medical technology most often used to visualize the organs of the abdomen. CT scan may also be used. Lower-tech approaches to the examination of the abdominal organs include palpation, observation, and auscultation.
A Gastroscope is used to see the inside of the stomach. The procedure is called Endoscopy/Gasroscopy and can be done under a local spray or sedation
An X-ray.
inside a cats stomach
She ate herself
Microscope
laryngoscope
A Telescope
This instrument is called pluviometer (a rain gauge). See the link below.
kicroscope
A microscope
telescope
Telescope
telescope