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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.
Semiconductors: By now you have studied more than half of this course. You may have been to the study centre a few times. You might have taken lessons on audio cassette-recor
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
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Factor Scales Mr. X is not overtly expressing any form of generalized distress or negative emotionality; he is extroverted and verbally fluent (A= 39, PSYC=40, NEGE=43). Howev
Ultraviolet Radiations : The ultraviolet (UV) light has higher energy than visible light. Hydrogen lamps, deuterium lamps and other sources of ultra-violet are used for a variety
Explain Interferon Interferon interferes with viruses (hence the name) and is produced by most cells in the body. Interferons, like antibodies and complements, are proteins, an
Use the following procedure for fire fighting. (1) Always take a position between the fire and the exit so your escape route cannot be cut off. Fire extinguishers should always
Atmosphere: Atmosphere is an envelope of the most useful gases that cover the planet earth. It makes our planet unique and enables life to prosper. If the earth did not have a
Explain Modulating Process of Ageing Despite various researches, ageing becomes an inevitable process. The only option is to have good control measures. These are highlighted h
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