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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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What are the benefits of organic matter Most of the benefits of organic matter are attributable to its favourable influence on soil structure and in turn on the volume of soil
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Hey, I have to ask an expert questions for an assignment and I was wondering since you have a degree in botany how would a multi vitamin affect a plant?
Primate Heritage: Man belongs to a group of animals called mammals which are different from other animal groups in possessing hair, and milk producing mammary glands, among
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