It doesn't have any sex or nudity, but Raquel Welch is in it. So, you know...

The movie opens with a fiery car crash and a shootout. No one gets shot, no blood.

The movie centers around a stylized fantasy depiction of the interior of a human body, including veins, arteries, heart and lungs. It is not very realistic, but organic enough to be gross for some viewers.

Three uses of "damn."

Some cigar smoking by military types.

One character, while reduced to microscopic size, is crushed to death by a white blood cell. Improbable though it may be, this scene is quite graphic and may upset younger or more sensitive viewers.