The veterinarian requests 600 cc of a solution. The measuring instrument only has marks for milliliters. You know the correct equivalent of 600 cc in milliliters because:

• A. cc and ml are equivalent.
• B. A cc is twice the amount of a ml
• C. A ml is twice the amount of a cc
• D. A ml is half the amount of a cc

Answer: (A)

Volume units in the metric system are interchangeable when dealing with cc and ml. A cubic centimeter (cc) is defined as the volume of a cube 1 cm on each side, which equals 1 milliliter (mL). So 600 cc is the same as 600 mL. No multiplication or division is needed because they are the same size. In practice, syringes often use either label, and reading 600 on a milliliter scale corresponds directly to 600 cubic centimeters.