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A Petri dish (alternatively known as a Petri plate or cell-culture dish) is a shallow transparent lidded dish that biologists use to hold growth medium in which cells can be cultured, originally, cells of bacteria, fungi and small mosses.

A vaginal speculum is used by gynecologists to open the vaginal walls and examine the health of the vagina and cervix. It is used during a pelvic exam or Pap smear test The speculum is inserted into the vagina and opened to widen the vaginal walls, making it easier to view the cervix and check for abnormal growths or other irregularities.