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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.
Permanent tattoos are made by injecting pigment into the skin. Into which part of the skin is the pigment injected, the epidermis or dermis?
Brefily describe diffusion ? Diffusion : Diffusion is the process in which there is a net movement of particles of a substance from an area of higher concentration to an are
what chemistry
F a c t o r s responsible for transboundary diseases Factors that affect the entry, establishment and spread of animal diseases include globalization; human population gr
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Antibacterial activity Rifaximin reaches high concentrations in the intestinal tract and is active in vitro against a broad range of enteropathogens, including ETEC, EAEC, Shi
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