Answer:
Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing. Epithelial layers contain no blood vessels, so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane
It is surrounded by it's environment.
First blank space is endocrine system and the second blank is hormones
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It is domian, kingdom, phylum,class,order, family, species. aka. King Philip coughed on Fred and then he got sick
