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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.
Define the Factors That Influence the Facilitated Diffusion Facilitated diffusion is influenced by the following factors: Minor differences in the molecular structure ma
Biological evolution We can presume that biological evolution began with the formation of the first true cells. These must have been forms that did not require free oxygen
Temperature variations in glacial regions In glacial regions of the world or during forest fires the rocks are exposed to extreme temperatures. Since the conduction of heat is
What is necessary to restore the Marshall wetland in Margibi County, Liberia? The Marshall wetland has several features , including mangrove swamp, which is being degraded in some
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Applications of Laser: Due to its properties, laser light can be put to a number of uses in industry, medicine, communications etc. We will briefly describe some of these us
Explain the Urine Creatinine Test This test measures the amount of creatinine in urine. A measurement of the serum creatinine level is often used to evaluate kidney function. U
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