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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 are the functions of the natural environment?
Explain the Functions of Parathyroid Gland The main function of the parathyroid gland is to regulate the calcium levels in our body so that the nervous and muscular functions (
what is signal transduction?
laboratory apparatus for separating mixture
a. How many ion pairs are produced in 1 cm 3 of air during an exposure of 100 mR? The density of air at STP is ρ = 1:293kg m -3 . What is the absorded dose to air? b. An thin w
Primate Heritage: Man belongs to a group of animals called mammals which are different from other animal groups in possessing hair, and milk producing mammary glands, among
Reactions of Carboxylic Group Salt formation: In alkaline medium, XOOH group reacts with metal hydroxide to form amino acid salts.
Explain the Types of White Blood Cells White blood cells are actually a whole collection of different cells that work together to destroy bacteria and viruses. You may recall s
Explain the Glomerulus: Structures of a Nephron Glomerulus: It is the main filter of the nephron and lies within the Bowman's capsule. It resembles a twisted mass of tiny tubes
what are the subdivisions of ecology
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