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How Your Heart Valves Keep Blood Flowing One Way
Did you know your heart valves NEVER all open at once? ❤️ Inflow and outflow valves work in perfect opposition to keep blood moving one way. #didyouknow #facts #heart #anatomy #biology #shorts
How the reel opens
Your heart has four valves, and they never all open at once.
Think of them as one-way doors, built to stop your blood from ever flowing backward.
From the free preview — the complete narration script is included with your purchase.
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- Full-resolution vertical video (1080×1920) with voiceover, captions and music
- Complete narration script included
- Instant download after payment
