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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.
Explain the Functions of Stomach 1. Mechanical function: Muscular action of the stomach helps in the mixing of food with the digestive juices and also helps to propel the food
what are atoms
what are the 7 characters of pea plants observed by mendal?
Explain Bile - External Defence Mechanism It is an alkaline secretion of the liver, which checks the growth of foreign bacteria on the partially digested food.
Riboflavin (vitamin B2) Riboflavin was isolated in a crystalline form from milk by Kuhn and co-workers in 1933. Because of this, the early name of the vitamin was la
Define the Complement system The complement system is a series ofproteins. There are only a handful of proteins in the complement system and they are floating freely in our blo
advantages and disadvantages of protozoa
Observing sun spots Use the telescope that you made in a last experiment. Set it up so that it points directly at the sun and focus it so that a clear and bright image of the s
Define the parietal area of the Cerebrum The parietal area, as you can see in the Figure, lies behind the post central area and includes greater part of parietal lobes of the c
You are the mayor of a beautiful city by the ocean, and your city is connected to the mainland by a set of k bridges. Your city manager tells you that it is necessary to come up wi
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