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Is the epithelium vascularized? How do nutrients and oxygen reach the epithelium? Why is this feature a significant evolutionary acquisition?
Epithelia are not vascularized (capillaries do not directly reach their cells). The epithelium exchanges substances by dispersal with the connective tissue situated under it.
As the epithelia are not vascularized minuscule skin injuries or scratches that occur all the time do not trigger bleeding and do not expose the blood to contamination from external agents. This is an significant protective method discovered by evolution.
Mollusks
Explain about the Nutritional recommendations for Healthy Ageing? You would recall reading about meal planning during various stages of life, spanning right from the infancy ti
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Explain the gradient theoryof experimental embryology
Curdlan Curdlan, a glucan with (1→3) is produced by bacterium Alkaliqenus faecalis var. myogenes and some related bacteria. It is a tasteless, odorless white powder, which sw
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Define the Diet intervention for lactose intolerance? Lactose is present in dairy products such as milk, cheese, yoghurt, ice cream etc. Hidden sources of lactose may include
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