Harrison

My single best moment so far at the london 2012 Olympic games would be when Hamish Bond and Eric Murray won gold for New Zealand in the rowing. It was a very interesting race and eventually when they crossed the finish line smashing the Olympic record. I was very proud to be a New Zealander and very happy

Introduction

The circulatory system is a system that circulates oxygenated blood around the body and keeps our muscles oxygenated for action everyday.

Description of the parts

The heart is made up of parts, the superior vena cava, the aorta (the bodies biggest blood vessel) the left ventricle which leads to the left lung, the right ventricle which leads to the right lung, the right atrium and the pulmonary artery which supplies blood to both lungs. The arteries take blood away from the heart and veins take deoxygenated blood back into the heart. There are also tiny little things called capillaries that connect veins and arteries. Did you know that ten capillaries placed side by side would be as thick as one strand of hair.

How it works

Blood travels around two loops in the circulatory system one carries blue blood (oxygen poor) and one carries that carries red blood (oxygenated) from the heart and back to the heart. Once the blood is pumped from the heart it goes through tiny little links called capillaries, which run all through the body and act likeroad links between veins and arteries. As the oxygenated blood passes by the muscles it releases all the oxygen into the muscles and then eventually the blood gets back to the body again and keeps everything fresh. Conclusion The circulatory system moves blood around the body giving muscles oxygen and helping live our daily lives. By Harrison Biggs