Which combining form is used to indicate the bladder?

• A. Cycl/o
• B. Conjuctiv/o
• C. Crani/o
• D. Cyst/o

Answer: (D)

In medical terms, combining forms name body parts. The one that indicates the bladder is cyst/o. It comes from a root meaning bladder and appears in words like cystitis (bladder inflammation), cystoscope (instrument to view the bladder), and cystography (imaging of the bladder). The other options refer to different structures: cycl/o relates to the circle or to the ciliary body of the eye; conjunctiv/o relates to the conjunctiva of the eye; crani/o relates to the skull. So cyst/o is the correct combining form for the bladder.