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Continuous suture technique: Monofilament 2'0' prolene sutures, which slide through easily, are used for this technique. three double armed prolene sutures are taken and with valve kept outside the aorta on a holder, all the loops re taken on the aortic annulus and the skirt of the valve. The valve is lowered at the same time as the loops are pulled and tightened using nerve hooks. Once valve is seated all loose loops are tightened. The ends of the sutures at the three commissures are tied and cut off. If necessary, the valve can be rotated after it has been fixed.
Trophic Level - Ecosystem In an ecosystem, the various biotic components are related to each other and form food chains. If we group all the organisms in a food chain accordin
CYTOPLASM Name proposed by Strassburger. According to Muhlethaler and Frey- Wyssling fluid outside nucleus is called cytoplasm. Two parts of cytoplasm. (1) Hyaloplasm or
Which is the autotrophic group responsible for the production of most part of the molecular oxygen of earth? Cyanobacteria and Algae of the phytoplankton are the organisms that
Types of Metamorphic Changes The process of metamorphosis includes reactivation of the morphogenetic processes. The morphogenetic changes also the mode of causation of these
How is the circulatory system of reptiles characterized? What is the basic difference among the reptile and the amphibian heart? The circulatory system of beings of the class R
The effect of gravity on roots Cut various pieces of blotting paper about 8 cm square. Place these among two squares of glass. Place several radish or mustard seeds among the b
a) What is meant by 'vaso-dilation'? b) What are the effects of vaso-dilation in the skin? (a) Vaso-dilation is an enhance in diameter of small arterioles and
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Q. Dietary modification? Dietary modification includes nutritional support that allows normal growth and development. Plasma phenylalanine concentration between the range of 40
Q. Do echinoderms have an excretory system? How is excretion done in these animals? Echinoderms do not have an excretory system their excretions are eliminated by diffusion.
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