How the Heart Works: Chambers, Valves & Blood Flow

Follow blood through the four chambers of the heart, the lungs and the body. See how the septum, valves and thicker left-ventricular wall support two connected journeys. Includes a quick knowledge check. YOU WILL LEARN • Which chambers receive blood and which pump it out • The route from the body to the right heart, lungs, left heart and back to the body • How the septum, four valves and thicker left-ventricular wall support circulation • Why arteries and veins are defined by direction rather than oxygen level CHAPTERS 00:00 One heart, two connected journeys 00:16 Position and size 00:26 Four chambers 00:41 Right heart to lungs 00:59 Left heart to body 01:13 Septum, valves and the thicker left-ventricular wall 01:37 Arteries, veins and oxygen colors 01:54 Quick check and recap 02:14 Keep exploring SOURCES OpenStax Anatomy and Physiology 2e, 19.1 Heart Anatomy https://openstax.org/books/anatomy-an... NHLBI How Blood Flows through the Heart https://www.nhlbi.nih.gov/health/hear... Kienle et al. Why do veins appear blue? A new look at an old question https://pubmed.ncbi.nlm.nih.gov/21085... Original schematic 3D teaching animation. Anatomy, colors and timing are simplified for learning. Blue marks relatively oxygen-poor blood; blood itself is red or dark red. Right and left refer to the person's own sides. Narration generated with ElevenLabs using Jarnathan from the NaS Learn Professors collection. ABOUT NaS NaS exists to help people understand life and advance scientific discovery. Explore our research, the tools we build, and the science behind them. https://nasresearch.bio #HeartAnatomy #BloodFlow #NaSResearch