bioarraycreative123
Epithelial cells are arranged in tightly packed layers that line the surfaces and cavities of tissues and organs throughout the body. It covers rang skins, respiratory tracts( nasal cavity and lungs ), alimentary tracts(oral cavity, stomach, intestines ), urogenital tract (kidney, vesicae, uterus and epididymis ), from all anacrine glnads (pancreas, gallbladder, mammary gland, salivary glands, lacrimal gland, sweat gland and etc. ), even some immune system organ (like thymus gland ).
