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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.
Q. Which are the most important inorganic molecular substances for living beings? Ans. The most important inorganic substances for living beings are mineral salts, water,
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Composition of agar Agar we learnt consists of a mixture of agrose and agropectin. Agrose has a linear polymer structure consisting of alternating D-galactose and 3,6-anhydro
main branches of biology
Explain Historical Example of connecting models and data? An excellent instance of a program that links theory and data is collaborative work on the population dynamics of flou
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