Animal cell junctions Animation

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The most common types of cell junctions in animal tissues.
Three types of cell junctions are common in animal cells: adhering junctions, tight junctions, and gap junctions.
Adhering junctions hold cells together in tissues of the skin, heart, and other organs that are subject to stretching.
Tight junctions link cells that line body surfaces. They keep water-soluble substances from leaking between the cells.
Gap junctions link the cytoplasm of neighboring cells. They are open channels for the rapid flow of signals.
Cells that act in a coordinated fashion, such as those in the heart, are rich in gap junctions.