endoscope

"The patient followed the doctor's instructions carefully. "

"My stomach rumbled loudly during lunch break; I was very hungry. "

"The violinist was a master of her instrument."

"bodily organs"

"He built himself a cabin in a hollow high up in the Rockies."

"His bodily deficiencies were a heavy burden to him."

"the orifice of an artery or vein;   the orifice of a wound;   the vagina and other orifices"

""Many students have problems understanding fractions." "

"If you still feel unwell tomorrow, see your doctor."

"The farmer used the canal to transport his crops to the market. "

"The inside of the building has been extensively restored."

"He examined the crime scene for clues."