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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 earth made of? The overall composition of the Earth, in terms of elemental composition is as follows: Iron 34.6% Oxygen 29.5% Magnesium 12.7% Silic
what is the significance?
connect 2 spring balances with their hooks. Ask partner to hold one end of the balance while hold the other end horizontally. Pull the spring balance while your partner just hold t
What is the significance of soil colour Soil colour is significant in soil classification, i.e. the characterisation of soil, interpreting soil properties and understanding so
Define Calculi and casts - abnormal constituent of urine An abnormal concretion in the body usually formed of mineral salts and found in the gall bladder, kidney or urinary bla
Define the term - Soil Flora Higher plants are, by and large, the most important group of primary producer organisms in the whole soil. The continuous decay of plants and plant
What is rancidity This results from the formation of aldehyde due to the oxidation of unsaturated glycerides or by the liberation of fatty acids due to hydrolysis. In
What constellations does the ecliptic pass by? Where is the Celestial Equator (in relation to the planets & the ecliptic)? Are the planets east /west of your local meridian? Whe
STERILIZATION OF GLASSWARE Activity is related activities. Whenever you require the glassware for doing an experiment you can follow the procedure given in Activity independent
Severe Bleeding In case of severe bleeding, use the following steps: (1) Control bleeding by the following means: (a) Apply direct pressure on the wound for 5-15 minute
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