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ground substance
In connective tissue, the ground substance, is an amorphous gel-like substance surrounding the cells. In a tissue, cells are surrounded and supported by an extracellular matrix. Ground substance traditionally does not include fibers (collagen and elastic fibers), but does include all the other components of the extracellular matrix.
The components of the ground substance vary depending on the tissue. Ground substance is primarily composed of water, glycosaminoglycans (most notably hyaluronan), proteoglycans, and glycoproteins. Usually it is not visible on slides, because it is lost during the preparation process.〔(【引用サイトリンク】title=Connective Tissue )〕
The meaning of the term has evolved over time.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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