To coordinate the contraction of the numerous muscle cells that form the heart, signals must travel rapidly between muscle cells. In order to allow this rapid communication, muscle cells in the heart are connected by

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Gap junctions are specialized cell junctions that allow for rapid communication between cells. They are formed by connexin proteins that create small channels or pores, allowing ions and small molecules to pass from one cell to another. In the heart, these gap junctions coordinate the contraction of many muscle cells, allowing the heart to beat in a synchronized and efficient manner.

To Coordinate the Contraction of the Numerous Muscle Cells That