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What is basement membrane? and what is it made up of ? in detail plss help​

User Seungah
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Basement membranes are thin, dense sheets of specialized, self- assembled extracellular matrix that surround most animal tissues. The basement membrane is a fibrous matrix composed primarily of glycoproteins, type IV collagen, and laminin that are secreted by the epithelial cells.
User Lars Bilke
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