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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.
Animal studies Most toxicological data for risk assessment are derived from the animal studies and it is, therefore, essential that these studies be conducted following widel
Mature Embryo A typical dicotyledonous embryo, as seen in a median longitudinal section, consists of an embryonal axis having two broad cotyledons. The portion of embryonal ax
Family is the Basic Unit of Society Each child within a family needs love and security to develop feelings of trust and self esteem. Each child is a unique individual who h
how they are joints to each other
Determine Guidelines to Lower Risk and Wise Use of Drugs? There can be no two views regarding the act that the management of many diseases require drug therapy. However, they m
Q. How do biodiversity, the total number of living beings and the biomass respectively vary during the ecological succession? The Biodiversity, the biomass of an ecosystem and
Humans have selectively bred many radically different domestic animals(e.g., St. Bernard and Chihuahua dog breeds). Does this activity result in evolution? why or why not?
Q. Dietary Fibre requirement during diabetes? Dietary fibre is that part of food which is not digested by the intestines. High fibre meals have shown to give the best glycemic
Briefly explain about Food preservation Food preservation, as you are aware, is the process in which the perishable food materials are given a suitable physical or chemical t
EPIDIDYMIS - All seminiferous tubules form short straight tubules as tubuli recti, open into wider network of rete testis. From rete testis 15-20 fine convoluted tubules,
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