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These circular orifices are located at the upper ends of the outflow parts of the left and right ventricles respectively. The pulmonary orifice which is 3 cms, is 0.5 cm larger than the aortic orifice. The aortic orifice is placed in front and to the right of the mitral orifice. The pulmonary orifice is placed above and to the left of the tricuspid orifice and the aortic orifice intervening between them. The pulmonary orifice is guarded by the pulmonary valve and the aortic orifice by the aortic valve. Each valve consists of three semilunar cusps. Each cusp is triangular. It has a convex edge which is attached to the part of the margin of the orifice. It has two free margins that meet at the apex of the cusp. Each cusp consists of a double fold of endocardium with some fibrous tissue in it. The region of the apex is thickened to form a nodule while crescentric parts near the free edges are called lunules.
Q. What is the metagenesis? What are the other names of this procedure? Metagenesis is thekind of life cycle in which there are two different forms of individuals of the same s
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Q. Describe Coronary Spasm? Usually spasm develops at the site of subcritical or critical stenoses, but it may also occur in angiographically normal coronary arteries, the so c
Which of the following does not support evolution? biogeography the fossil record comparative anatomy radiometric dating All of these choices are evidence of/support evolution.
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What proportion of children with down syndrome do you expect when women with down syndrome have children with men who have 46 chromosomes? justify answer
Osmoregulation in Animals Osmoregulation associates to the regulation of water and ionic content of the body of non-chordate metazoans. These might be osmoconformers / osmoreg
Q. What do you mean by Transition Period? The transition period from the Renaissance to the Modern period produced many notable workers and much literature. Botanists gradually
What is the difference between the alpha helix and the beta-sheet protein conformations? Ans) Alpha helix and beta-sheet conformations are the two major types of secondary struc
Dominance In each community, a few over topping species are present in greater bulk. By their greater number or biomass (living weight) the dominant species modify the habitat
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