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Q. What is the difference between simple closed circulation and double closed circulation?
Double closed circulation or Closed circulation is that in which the blood circulates through two associated and parallel vascular systems one that carries blood to and takes blood from the peripheral tissues that the systemic circulation and the other that carries blood to and takes blood from the tissues that perform gas exchange with the environment, for example, the lungs that is pulmonary circulation. Double circulation occurs in reptiles, amphibians, mammals and birds. Simple closed circulation or simple circulation is the one in which the tissues that perform gas exchange are associated in series with the systemic circulation as in fishes.
Most of the water taken up by a plant passes through it and is evaporated to the atmosphere.What use is made of the tiny fraction of this water which is retained by the plant?
How does the interaction between a carrier protein and the substance it transports resemble the interaction among an enzyme and its substrate? Both include the binding of a spe
Biological Valves : Biological valves are available for all positions. For mitral position they are usually mounted on a stent (stent mounted) whereas for aortic position they ma
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Find the electric potential, taking zero at infinity, at the upper right corner (the corner without a charge) of the rectangle in the figure. (Let y = 3.7 cm and x = 6.7 cm.)
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