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Arteries are blood vessels that carry blood away from the heart. They have thicker walls than veins in order to cope with far higher blood pressure level...

An organism that causes disease e.g. bacteria, virus

An increased heart rate will cause an increase in blood flow around the body (increased cardiac output). This means that there will be more oxygen and more glucose being supplied to the muscles. Since oxy...

pancreas detects low blood glucose, so produces glucagon. glycogen is converted to glucose