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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.
Question 1: (i) Show a diagram to show how temperature varies with altitude. Show clearly the location of the tropopause, stratopause and mesopause. (ii) Briefly explain the
Evaluating the possible problems of a technology compared to the expected advantages is known as a ?..
INTRODUCTION : In the first unit of this block you read about hazards due to electricity and gases in the science laboratories. 'The second unit deals with yet another type of com
which instrument measure the air pressure
three adaptations that help humans have differential survivability, and three adaptations that help humans have differential fecundity
Explain the Enterohepatic Circulation of Bile Any compound which is secreted in bile and subsequently reabsorbed from the small intestine, returns to the liver and is then rese
Describe the structure of the stomach. How is it modified to carry out its functions? How does It compare to that of the fetal pig?
Solar Wind and Solar Flare Most of the Sun's family is continually bathed in an outflow of material from the Sun's atmosphere. Streams of electrons and protons continuously
Laboratory Safety Codes: BIS has prepared the following three codes (in the form of small books) regarding laboratory safety: i) Code of safety in microbiological laboratories
What is genetics>
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