intercalated disk


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INTERCALATED DISK: Intercalated disk at the ends of adjacent cardiac muscle cells

intercalated disk

A modification of the cell membrane of adjacent cardiac muscle cells; it consists of extensive folds and intercellular junctions for electrical and mechanical linkage of contiguous cells.
See: illustration
See also: disk

intercalated

inserted between.

intercalated disk
dark staining, transversely oriented bands scattered through cardiac muscle fibers; points of end-to-end contact between contiguous myocardial fibers.
intercalated duct
small tubules connecting alveoli of salivary glands to intralobular striated ducts and finally to excretory duct.