A piece of foam with an open cell structure is introduced into the wound and a wound drain is placed with lateral perforations on top. The entire area is covered with a transparent adhesive membrane, which is firmly fixed to healthy skin around the wound margin. When the exposed end of the drain tube is connected to a vacuum source, fluid is withdrawn from the wound through the foam into a reservoir for later disposal.It is necessary to cover the wound bed with a soft polyvinyl alcohol foam sponge, a non-stick oil-emulsion dressing (for exame, Johnson and Johnson), a contact layer (such as Mepitel), a thin layer of amorphous hydrogel (can be Intrasite Gel), or a calcium alginate (such as Sorbsan) before application of the gray sponge. Avoid the use of Vaseline, which is too oily and can alter the adhesion of the VAC cloth.
There are 2 types of Metabolic reactions
1) Anabolism : In this type smaller molecules combine to build up larger molecules
2) Catabolism : In this type of reactions large molecules broke down to small molecules
Answer:
While on his voyage on the Beagle,while in Galapagos Island he observed that Finches(birds) across the island are similar but different in the structure of their beaks. This mystified him and he puzzled on thus on why there were differences in the beaks shapes.
He therefore postulated from the observation that beak shapes of these birds must be responsible for the adaptation to their habitats.Thus these birds must have come from common ancestors,(and the need to survive by adaptations to different environments is responsible for the beak shapes). The driving force for these phenomena is Natural selection.Therefore,where the size of beaks is the needed adaptation for survival,birds with larger sizes will be selected over those with smaller beaks for eating Feeds(selection pressure) and therefore will be better adapted and naturally selected than smaller birds.
Darwin predicted that the dormant traits(large beaks) will remain in the population as the parents pass these to their offspring from generation to generation,while the population smaller beaks which could not resist the selection pressure will fizzled out.
Thus the better adapted larger beak population will dominate and evolved after a long period of time.Thus all organisms with adaptations and naturally selected on earth must have evolved from a common ancestor.
Although Darwin proposed these,he lacks knowledge of genetics,therefore he could not explain how dominant traits for adaptation are inherited from one generation to another.However,mutation which gives rise to variations is driving force for the changes in structural characteristic for adaptation.Gene flow,gene drifts,together with natural selection are the driving forces.
Explanation:
A plasmid is a small, circular, double-stranded DNA molecule that is distinct from a cell's chromosomal DNA. Plasmids naturally exist in bacterial cells, and they also occur in some eukaryotes.
Answer:
it depends on what your eating when you eat your body digests the food and uses what it can to provide what your body needs
Explanation:
