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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.
what are oviviviparous
What is the significance of Pronephric? The first, or ancestral, kidney that appears in the anterior part of the coelomic cavity and is connected to the archinephric duct. In a
If a microbiology lab technician left the safranin out of the Gram stain procedure, what would be the result?
Q. Vitamins requirements for ulcerative colitis? Vitamins: Commercial multivitamin preparation should be administered orally especially the ones needed for the healing process
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Define Carbohydrate requirement to avoid underweight problem? Liberal amounts of easy to digest carbohydrates should be included in the diet. The intake of dietary fibre should
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How membrane maintained impermeability to potassium At 1 AM, an impermeable membrane divides a 1 liter solution of 1M NaCl in the left compartment from a 1 liter solution havin
Presenting Features Anterior abdominal wall and anterior bladder wall is deficient and on the surface everted posterior wall of bladder with two ureteric orifices is seen.
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