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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.
Explain the Parathyroid Glands The parathyroid and thyroid glands are neighbours in the neck. You would realize that parathyroid glands are the small glands that lie behind the
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Explain the Functions of Parathyroid Gland The main function of the parathyroid gland is to regulate the calcium levels in our body so that the nervous and muscular functions (
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