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How the lungs work
Cut the bottom off a large bottle. Fit a cork to the neck with a Y tube in it. On every of the lower limbs of the Y tie a rubber balloon or a number of small bladder.
Tie a sheet of brown paper or sheet rubber round the bottom of the jar, with a piece of String knotted by a hole and sealed with wax. Pulling this string lowers the diaphragm and air enters the neck of the Y piece causing the balloons to dilate.
Pressing the diaphragm upwards has the opposite effect.
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Which is the largest reef? This is the Great Barrier Reef off the northeast corner of Australia.
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Explain the Aplastic Anaemia Bone marrow aplasia means 'lack of functioning of bone marrow'. This can occur due to excessive X-ray or radiation treatment, certain industrial ch
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