The Whiteboard
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❤️ Heart & Circulation

Follow one drop of blood all the way around. Watch it turn from blue (oxygen-poor) to red (oxygen-rich) and back. Tap a chamber to name it.

from body to / from lungs to body Right atrium Right ventricle Left atrium Left ventricle
Step 0 of 8

Press Follow a drop to begin the journey through the heart.

Memory hook: "Right side → lungs, Left side → rest." The left ventricle is thickest because it pushes blood the farthest.