Ks4 the heart and circulatory system (boardworks)
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© Boardworks Ltd 2004 1 of 49 KS4 Biology The Heart and Circulatory System.
Drill of the Month Developed by Michael Lindsay An Overview of Ventricular Assist Devices & Pre Hospital Management.
Composition Nitrogen: 78.1% Oxygen: 20.9% Other Gases: Argon : 0.9% CO 2 : ~370 ppm: Green House Gas Methane: Green House Gas Ozone: blocks UV radiation.
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