Movie description Professor Frank Baxter and some animated friends answer questions about blood. what makes it red? Why do little animals' hearts beat so quickly? And so much more.
Actors Frank Baxter
Role(s): Himself
Details Richard Carlson
Role(s): Mr. Fiction Writer
Details Mel Blanc
Role(s): Squirrel / Turtle / Alligator / Rabbit (voice)
Details Sterling Holloway
Role(s): Lab assistant
Details Marvin Miller
Role(s): Hemo / Professor Anatomy
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