I love this film so much, I transferred mine to DVD (with beautiful results!) so i could watch it again and again without it degrading like VHS tapes do. Did you know Hemo debuted at 9 pm,on CBS TV March 20, 1957? It was the second Bell Science gem ("Our Mr Sun" first shone the previous November). It stars Dr Frank Baxter , Richard Carlson (cigarette smoking man in the picture) from "The Creature from the Black Lagoon", Sterling Holloway (the Disney legend THE original Winnie the Pooh and Kaa from Jungle Book) and of course HEMO.....Hemo is the best educational film EVER- This movie has inspired and continues inspire generations of health professionals- Imagine today's Doctors, Pharmacists, Nurses, Dentists, Paramedics as 6th graders sitting on the floor in their Toughskins watching Hemo for the first time. Nobody teaches the LUBDUBS like HEMO [its all in the valves]! HEMO also shows us why we breathe, why we faint when we stand for too long, why we stretch each morning, how boxers get knocked out, vagal and sympathic systems and MUCH MUCH MORE! When I watch Hemo as an adult health professional I am amazed at how well it stands up and how much solid info is packed into this 55 minute masterpiece! .