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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.
j shaped plant curve
how can isolated brown dwarf passing between another star and the earth could be detected?
Medieval Science: We can record the sum total of the medieval achievement in the natural sciences in a few lines. It can be put down as a few notes on natural history a
Observing pollen grains from different flowers First of all we have to Secure several flowers in which the pollen has formed on the stamens .Shake pollen from each kind of flo
true or false? water conservation efforts have been wholly inaffective
Non-Specific Defence Mechanism The non-specific defence mechanism is implemented for different types of infections. It resists infection in two ways, firstly, by blocking the e
Competitive inhibition This type of inhibition takes place when a compound having a strong structural resemblance to the substrate competes with it for the catalytic site
Vaccination: Now let us see how vaccination protects us from disease. We have mentioned above that the W.B.Cs. produce antibodies which neutralise the toxins produced by th
Q. Do you know of any activity which may be polluting this water source? Answer: The discharge of waste water from homes, industries, hospitals, etc. into the river pollutes thi
Scientific approach to problem solving: The scientific method and the features of scientific knowledge described above are in no way restricted to the domain of scientists alo
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