This is a movie that has played tricks in my memory over the years. I first saw this when I was a child, and for some reason recall a much more exciting journey with lots more happenings, including a much longer passing through a beating heart - which doesn't actually happen at all, and so I guess the memory really does play some giant tricks with the passage of time!
I guess many young people may be very critical of this film, since nowadays there are so many much more advanced and sophisticated special effects. However, for its day, this was quite brilliant!
A group of Experts climb into a submarine and are 'miniaturised' and sent on a mission inside a human body to repair some damage to the patient's brain - a fantastic voyage indeed! Of course the team meet with all kinds of 'natural' perils that are within the human body along the way.
There are some 'silent' points in this movie pretty early on which have impact.
Stars Donald Pleasence and Raquel Welch.
This has been re-mastered to a very high degree.