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Q. Is the epithelium vascularized? How do oxygen and nutrients reach the epithelium? Why is this feature an important evolutionary acquisition?
Epithelia are not vascularized capillaries don't directly reach their cells the epithelium exchanges substances by diffusion with the connective tissue situated under it.
Since the epithelia are not vascularized minuscule scratches or skin injuries that happen all the time do not trigger bleeding and do not expose the blood to contamination from external agents this is an important protective strategy discovered by evolution.
Describe the structure of the teeth? How is this tissue modified to carryout its function?
Medical Management Trealment of choice is cephalosporin which is given interavenously, alternatively can be given. In case of increased intra cranial pressure mannitol and o
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Give the salient features of phylum protozoa
Unprecedental clarity has come to our understanding of genetic differences by the analysis of DNA sequences. It is not surprising in which the latest DNA technologies are leading t
Natural Classification Natural classification is based on the natural characters of the taxa. Some consider natural classification a phylogenetic one reflecting the evolutionar
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