Explain testing for oxygen in animals<span>- Water animals regularly test the amount of oxygen in their blood. - Carbon dioxide is easily diffusion into water and this makes oxygen regulation more sensitive than carbon dioxide testing.
</span>Explain insects and how they ventilate<span>- Air passively enters spiracles on the side of their body → - Tracheal tubes carry air DIRECTLY to the cells - There is NO need for red blood cells to carry oxygen! - Do insects have blood as a transportation agent?
</span>Explain removal of carbon dioxide in animals<span>- 7% is dissolved in plasma - 23% combined with Hb - 70% converted into hydrogen carbonate ions (HCO3-) (in red blood cells) and transported in plasma - Once in the lungs, carbon dioxide is removed and exhaled.
