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Epithelial tissue is avascular but innervated. Epithelial tissues do not contain blood vessels, that is they are avascular. Epithelial tissues are nearly completely avascular (without blood vessels).
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Nutrients are supplied by diffusion from blood vessels of the lamina propria. It also helps in the movement of substances, like absorbing nutrients or secreting sweat and saliva. The basal surface of the epithelium.
Epithelial tissues lack blood vessels.
They receive nutrients and oxygen via diffusion from the underlying connective tissue, which is rich in blood supply. Epithelial tissues are nearly completely avascular. Epithelia contain stem cells in their basement membranes. The endothelium is the epithelial tissue that lines vessels of the lymphatic and cardiovascular system, and it is made up of a single layer of squamous cells.
In simple words, epithelial tissue acts like a protective cover for our body and organs. Due to rapid cell division, epithelial tissue can quickly replace. Epithelial tissue is avascular, meaning it does not contain blood vessels, primarily to prevent bleeding because this tissue is constantly exposed to mechanical and chemical. Connective tissues are usually highly vascular, and so the nearby connective tissue provides.
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For instance, no blood vessels cross the basement membrane to enter the tissue, and nutrients must come by.
For instance, no blood vessels cross the basement membrane to enter the tissue, and nutrients must come by diffusion or absorption. Epithelial tissues do not contain blood vessels (they are avascular), so nutrients and oxygen diffuse from nearby tissues. The endothelium is the epithelial tissue that lines vessels of the lymphatic and cardiovascular system, and it is made up of a single layer of squamous cells.
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