Ivy Waters International Standards · G5.S-01
Version 2.2.0 · 2026 · © 2026 Ivy Waters International. Licensed under CC BY 4.0.
Ages are the anchor. Grade names are Ivy Waters stage labels for this framework, not a claim about any national school system.
Science & Innovation
Your child can explain how the human heart pumps oxygenated blood through blood vessels and how the lungs exchange oxygen and carbon dioxide.
In real life
After a steep hike, your child takes their own pulse, notices their breathing has doubled, and explains why: their muscles needed more oxygen, so the heart and lungs sped up to deliver it.
Standards are permanent: an ID issued in this edition keeps pointing at the same standard. Cite it like this.
Ivy Waters International Standards v2.2.0 (2026). Standard G5.S-01: Human Cardio-Respiratory Systems. https://ivywaters.com/standards/G5.S-01
Ages are the anchor. Grade names are Ivy Waters stage labels for this framework, not a claim about any national school system.
A machine-readable CC BY 4.0 release is published for reuse and integration. Schools and tools may display, adapt, and map their own records against it with attribution.
Ivy Waters International Standards · Version 2.2.0 · 2026 · © 2026 Ivy Waters International. Licensed under CC BY 4.0.
