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Reference.org
Basement membrane
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<p>The basement membrane, also known as base membrane, is a thin, pliable sheet-like type of <a href="/facts/Extracellular_matrix/kaHC5Ez8">extracellular matrix</a> that provides cell and tissue support and acts as a platform for complex signalling. The basement membrane sits between <a href="/facts/Epithelium/ecKHcHC3">epithelial tissues</a> including <a href="/facts/Mesothelium/0PDq8h0o">mesothelium</a> and <a href="/facts/Endothelium/L4ENFVnw">endothelium</a>, and the underlying connective tissue. </p>