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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.
Pollution Now-a-days, you might have heard every one talking about pollution. What does pollution mean? Pollution is the addition to the environment (air, water, soil) of subst
how do you find the contour interval
Explain Cephalic Phase or Neural Phase 45% of the total gastric secretion is discharged in this phase. The flow of juice occurs before food reaches the stomach. Sight of food,
Explain Increased Cardiac Output i) An increase in blood volume increases the venous return and leads to an increased stroke volume. The increase in the blood volume may be d
1. The red shift seen in all distant galaxies, whose size is proportional to its distance from us, what effect will this have on planet Earth?
QUESTION 1 (a) How did psychology emerge as a separate scientific field? (b) Elaborate on any two schools of Psychology QUESTION 2 Elaborate on the correlational met
Factors decide the broad area of scientific activity
What is the rock cycle explain breifly? The rock cycle is the full "life" of a rock from its original formation to its demise through weathering, and rebirth through recrystall
Explain why earthworms are said to be the most important soil animals. Earthworms ingest organic matter as well as soil where they mix, granulate and excrete to increase stabil
Curing methods: The most impbrtant curing methods were classified under five heads, namely, inducing vomiting, giving purgative, enem;, oily enema and nasal therapy. Specifi
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