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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.
Are organic solvents like benzene and ether polar or non-polar substances? Benzene and the ethers are molecules without electrically charged portions and therefore they are non
Dormancy - Plant Growth Substances Dormancy can be defined as a state of suspended growth and metabolism. When most plants are exposed to seasonal periods of very inclement we
Determine the Goal of a BCC Programme The overall goal of BCC programs for diabetes mellitus is to promote behaviors that control blood sugar and prevent complications. Thes
What are gene interactions? What are the three main types of gene interactions? The Gene interaction is the phenomenon in which a given phenotypical trait is conditioned by two
T AXONOMIC EVIDENCES - Taxonomy is the classification of organism. The gradual development in the complexity of organisms with specialized characters from simpler organisms
#in which part of alimentary canal oblique muscle found?
Types of Biogeochemical Cycles There are two basic types of biogeochemical cycles, gaseous and sedimentary. In the gaseous type of biogeochemical cycle there is a prominent ga
Define Manganese Metabolism - Micro Minerals? Intestinal absorption of Mil occurs throughout the length of the small intestine although the exact mechanism of absorption is not
does crossing over occur in all the homologous chromosomes???
Internal budget - Nutrient Budgets This is concerned with the circulation of nutrients through various biotic and abiotic compartments of a given ecosystem. In other words the
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