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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.
Define the Vitamin and Minerals required for elderly? Decreased gastric secretion and intestinal motility affect the absorption and intake of nutrients especially calcium, iron
complete assignment
Ecology is divided into two fields: (a)Autecology (b) Synecology (a) Autecology: it deals with life history, population dynamics, behavior etc of a single
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illustrate vernalisation?
Q What are the differences and similarities between the transcription process and the replication processes? A DNA polynucleotide chain serves up as a template in the replication (
Q. What is an evolutionary explanatory hypothesis for the secretion by the heart of a hormone that regulates the renal function? Which is that hormone? The renal regulator horm
Define two major aspects of nutrition economics? There are two major aspects of nutrition economics. These aspects are: 1) Quantities of food commodities and their developme
WHAT IS THE CLASSIFICATION OF PROTOZOA ..
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