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Define age related changes in Cardiovascular system
There is a decrease in elasticity of the aorta and other large arteries as age increases. Thickness of blood vessels increases leading to a rise in blood pressure. The myocardium (muscle wall of the heart) shows atrophy. There are structural changes in the valves. Number of pacemaker cells gets reduced, thereby a reduction in heart rate is observed.
Forest and hill soils The hill and forest soils seem to be akin to soils developed in humid temperate regions, and have been found to include podsolised soils, brown Earths an
Homo Habilis-The First Tool Makers: One of the most important developments in human evolution was the dramatic expansion in brain size which, according to the fossil data
To show that liquids exert pressure Connect two 15 cm lengths of glass tubing or two transparent plastic soda straws with a short length of rubber tubing and attach them to an
Safety spectacles : Safety spectacles need to be used where there is the slightest risk of splashes of chemicals or fragments of dust, glass, etc. getting into the eyes.
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What is the name for the margin where two plates in the lithosphere slide past each other? Transform Fault Margins
Media and Distance Education: The role of media in distance education needs a specific mention. It is impIied that teaching is done from a dbtance. It is also understood that
what is cell
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