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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.
Define the Prolactin Prolactin is synthesized in lactotroph cells of anterior pituitary gland during pregnancy and during the entire period of milk production after the birth o
Advantages of Proteins Proteins are compounds of carbon, hydrogen, oxygen and nitrogen. On an average, proteins contain 16% nitrogen. Most proteins also contain sulphur and
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FIRST AID PROCEDURE FOR UNCONSCIOUS CASUALTIES : Let us now discuss the first aid procedure for unconscious casualties. The common causes of unconsciousness in a laboratory accide
Leguminous crop grown under phosphate deficiency conditions may suffer from N deficiency as well. Explain. Rhizobium bacteria infect the roots of leguminous plants and lead to
What is polychaetes digestion/feeding ?
Nematodes These are next to protozoa and are the abundant soil microfauna in soil. They are also called eelworms, thread worms or roundworms. Nematodes that feed on decayin
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Metamorphic rocks Igneous and sedimentary rocks that have been altered from their previous condition through the combined action of heat and pressure below Earth's surface are
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