What are the two types of extracellular matrix (ECM)?

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The two types of extracellular matrix (ECM) are interstitial matrix and basement membrane. The interstitial matrix is the gel-like substance that fills the spaces between cells in tissues, providing structural support and facilitating the movement of cells and nutrients. It contains a variety of proteins and polysaccharides that contribute to the overall architecture and function of tissues.

The basement membrane, on the other hand, is a thin, dense layer of extracellular matrix that separates epithelial cells from underlying connective tissue. It serves as a selective barrier, was being essential for the attachment of cells and influencing their behavior, such as proliferation and differentiation. This distinction between the interstitial matrix and basement membrane highlights the diverse roles that different types of ECM play in tissue structure and function.

Other options, while mentioning important components or types of tissues, do not accurately represent the classification of ECM. The fibrous and liquid matrix refers more to specific structural characteristics rather than categories, and cartilage and bone matrix are types of ECM associated specifically with those tissues but do not cover the broader classification of interstitial matrix and basement membrane.

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