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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.
What is the momentum of a man weighing 60 kg moving at 50 m/s
Define Volume of Urine - General Examination of Urine Volume: Measurement of the volume of each urine specimen passed is necessary for the conditions in which the fluid balance
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What determines sinking and floating? Shape a piece of lead, tin or aluminium foil into the form of a little boat and float it on the water in a pan; now wad the metal foil fro
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Explain Error catastrophe theory of Ageing As the cells age, there is a random increase in error in protein synthesis due to insertion of wrong amino acids. They become non- fu
Explain the Ketone bodies - abnormal constituent of urine Ketone body is an intermediate breakdown product of fats in the body. It can be any of three compounds (acetoacetic a
Define age related changes in Respiratory system During ageing, alveoli (present in the lungs) become flatter and shallower, alveolar ducts enlarge, walls become thinner, conta
Formation of the solar system: This theory is based on the assvmption that the Sun and all the planets were formed from a huge rotating cloud df interstellar gas and dust.
What are all the planets in our solar system?
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