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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.
Objectives After observing the demonstration experiments, you should be able to: 1. State the need for understanding the characteristics of a chemical waste before disposin
Explain the Emergency Contraceptive Pill (ECP) method The ECP method or "morning after pill" uses a high dose of combined oral contraceptives (OCs) to prevent conception. The O
TO SHOW WHERE AIR MAY BE FOUND 1) Plunge a narrow-necked bottle, mouth down into ajar of water. Slowly tip the mouth of the bottle in the direction of the surface of the water
father of environmental microbiology
b) discuss briefly the scientific and technical achievements of the bronze age
Satellite : Satellite transmission is one important symbol of revolution in communication technology. Besides transmitting picture and sound over long distances, it has revoluti
Define the functions of platelets The main function of platelets, or thrombocytes, is to stop the loss of blood from wounds, i.e. haemostasis. Let us learn about this function.
Explain Yawing Reflex Actions - Respiratory Pocess Yawning: It is a deep inspiration drawn through open mouth. Low oxygen tension in the blood may be the cause of yawning.
What time period can carbon-14 dates have? Carbon 14 has a half-life of 5,730 years, and thus it can be used to date very precisely a large majority of things, particularly woo
What is the job of chromatin in an animal cell?
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