https://tube.blueben.net/videos/watch/57d0f84e-c755-4e7b-a699-baa3281c2dda The Mechanics of Your Heart Valves Your heart contains four valves that control blood flow with every beat. Discover how these delicate structures open and close without muscles, prevent backward flow, and create the familiar lub-dub sound of your heartbeat. Sun, 08 Nov 2026 08:13:25 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/57d0f84e-c755-4e7b-a699-baa3281c2dda 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.