https://tube.blueben.net/videos/watch/c6cf582f-3408-4576-904c-1aa4fb840a55 Your Heart Has a Blanket What protects your heart from constant friction every time it beats, and how does a tiny amount of fluid help keep it moving smoothly? Sat, 08 Aug 2026 13:07:22 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tube.blueben.net https://tube.blueben.net/client/assets/images/icons/icon-96x96.png https://tube.blueben.net/videos/watch/c6cf582f-3408-4576-904c-1aa4fb840a55 All rights reserved, unless otherwise specified in the terms specified at https://tube.blueben.net/about and potential licenses granted by each content's rightholder.