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.

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Main Cast: Frank Baxter, Richard Carlson, Mel Blanc, Sterling Holloway, Marvin Miller

Directors: Frank Capra, William T. Hurtz

Writer: Frank Capra

Editor: Frank P. Keller

Cinematographer: Harold E. Wellman

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