The Structure And Functions Of The Human Body System

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The Human Body System AC 2.1. Explain the structure and function of at least 3 to 4 systems 1) The Circulatory System; This system transports blood, full of oxygen and nutrients to and from the heart, and all around the rest of the human body. At the same time it transports out carbon dioxide and other unwanted material such as harmful minerals, waste material resulting from cellular breakdown, nitrogenous waste in liquid form, and food additives.These are then taken to the liver where they get transformed, or to the kidneys so that they can be excreted out as urine, or through the intestines. The components of this system are; the heart, blood, and blood vessels, and it has 2 circuits that transport blood around the pulmonary circuit which runs between the heart and the lungs, and between the heart and the peripheral tissue. Blood contains plasma, red and white blood cells, and platelets, and runs through vessels that are categorised in to arteries, veins, and capillaries. Each of these has specific function, such as the veins being carriers of carbon dioxide rich blood from all parts of the body back to the heart, and the arteries carry oxygenated blood away from the heart to the cells tissue and the organs. Lastly the capillaries join up to form veins which empty into the heart.The heart is a hollow fibrous muscle that pumps blood by its rhythmic contraction, relaxation an expansion of the arteries. This is what is known as heart beats, and it does
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