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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. Explain about Mandible? In the mandible, attached keratinized tissue normally atrophies with the underlying bone. As a result there is generally a relatively narrow band of
Cu r in g and Smoking Meat curing refers to the production of the characteristic thermally stable pink meat pigment and cured meat flavour by the action of sodium nitrite an
Zinc (Zn) - Micronutrients In its function in some enzyme systems, zn 2+ resembles Mn 2+ in that it brings about substrate binding and conformational changes in enzymes. A n
Explain Angio-edema Angio-edema: Swelling of the mucous membranes, tissues beneath the skin or an internal organ because of an allergic reaction.
Explain the Culture Media and Its Types? A culture medium (Pl. media), we already know, is a solid or liquid preparation containing all the nutrients required by microorganisms
Directly observed therapy In treating TB, poor adherence to therapy is the most important cause of treatment failure and is associated with emergence of drug resistance. Medica
Q. What are the major cellular features of the beings of the plant kingdom? The typical plant cells are eukaryotic (have nucleus), photosynthetic (use light to make food) and a
Explain the interaction of vitamin a with Proteins? Proteins: The protein status of an individual influences vitamin A status and transport because an inadequate protein intake
List out the endothermic and exothermic reactions taking place in our body
Some ecosystems possess relatively large number of species as compared to others. This is particularly true of tropical forests which exhibit a very rich-biodiversity. For example,
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