News from Oaks Class

Oaks have been learning all about the heart and the circulatory system. We went onto the playground to do a role play. The children in the blue and red hoops represent the chambers (atria and ventricles) of the heart and show which ones pump oxygenated or deoxygenated blood. The yellow hoop represents the lungs, where the blood goes to collect oxygen (pens!). It returns to the heart with its oxygen and then gets sent to the body parts that need it via arteries. It then returns via veins to the heart to complete its journey. As well as this, we have investigated flow, seeing how different size holes allow for more liquid to pass through. Our arteries have thicker walls to maintain high pressure. Mr Howse showed us how covering the end of a hose makes the water go further as it builds pressure. Our arteries do this to make sure the blood can get all the way around the body. Our veins have valves to stop backflow if it runs out of pressure.