Final answer:
An endoscope is the instrument used for exploring and performing surgeries on tubular structures like reproductive organs. It uses fiber optics for illumination and observation.
Step-by-step explanation:
The instrument used for examining and performing surgery on tubular structures such as reproductive organs is known as an endoscope. An endoscope is a versatile device equipped with fiber optics, which illuminates internal structures and transmits reflected light back, allowing for both observation and surgery. Common reproductive structures that may be examined with an endoscope include the reproductive-female Fallopian tubes, uterus, and vagina, as well as reproductive-male organs.