Harold visits Otahuhu Primary

Harold taught us about the circulatory system. This is what we learnt. Our body needs oxygen,food,and water to work properly. These things are carried to all parts of our body by the blood. The blood is pumped by the heart,which is the strongest muscle in our body. The blood vessels which take the blood away from the heart are called arteries. The blood vessels which take the blood back to the heart are called veins.