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Define age related changes in Respiratory system
During ageing, alveoli (present in the lungs) become flatter and shallower, alveolar ducts enlarge, walls become thinner, contains less capillaries, respiratory surface area decreases, elastic recoil response is lost, pulmonary diffusing capacity gets reduced. The respiratory response to hypoxia and hypercapnia is sluggish in the elderly. There is an overall impairment in ventilation, diffusion, regulation etc. that leads to slowing down of the respiratory responses.
The effect of falling water on topsoil Fill a flower pot with sandy soil or loam. Set the pot under a dripping tap for an hour or more. View how the clay and inorganic matter a
Mars- the Red Planet After Venus, Mars is our closest neighbour. It seems very earth-like. There are ice-caps on its poles, drifting white clouds and raging dust storms in
what happens if one animal is not there
how can i understand science better
Packaging and storage of oil Rancidity can cause the oil to deteriorate and develop off-flavors during storage. Using clean, dry containers, which exclude light and heat, and p
Other visible light hazards : Ordinary, visible light can present a hazard under certain conditions. You can burn paper by focussing the sun's rays using a small magnifying lens.
Question 1 Define Eco-labelling. Explain the environmental importance of eco-labelling with examples Question 2 Discuss the elements of environmental roadmap for eco
Moisture comes from home plants Place a cellophane bag over a leaf of some house plant or garden plant and close the end about the stem with a rubber band. Make an observation
Land Use Planning and Management: People see land everywhere and get an impression that plenty of it is available. Besides, they do not care how it is being used, unless o
Spinal Cord: The spinal cord extends downwards from the brain stem through the protecting bony rings called vertebrae down the centre of the backbone, to the bottom of the
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