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TASK 4 BY VICTORIA MCDONALD Our cardiovascular system consists of the heart, vascular system and blood. These organs all work together to supply oxygen to our body, which we need to live. BLOOD Blood is used as a transport system, this picks up oxygen from around our body, and haemoglobin puts the oxygen into cells called red blood cells. Then this gets moved to our muscles that are contracting ready for movement to take place. HEART The heart this is the strongest muscle in the body, and has four parts to it these are called chambers, the heart also has separate parts to it these are called chambers. The left side of the heart consists of oxygenated blood and the right side consists of de- oxygenated. The cycle of the heart, our heart never stops beating. The vein called the pulmonary vein, this vein is attached to the lungs to collect oxygen. Haemoglobin then picks up...

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