explore-blog: So clever – the human body visualized as a subway map by designer Sam Loman, a fine addition to these visual metaphors using he London Tube map. Also see these vintage illustrations envisioning the body as a machine. Mind the gap junctions. Updated version here.
Gap Junction (nexus): a specialized intercellular connection between a multitude of animal cell-types; directly connects the cytoplasm of 2 cells, which allows various molecules and ions to pass freely between cells; one gap junction channel is composed of two connexons (hemichannels) which connect across the intercellular space; gap junctions are analogous to the plasmodesmata that join plant cells
Gap Junctions are channels between cell membranes that allow ions and small molecules to pass directly from one cell to another. These channels are formed by membrane proteins called connexins. Six connexins in the cell membrane form a channel called a connexon. Connexons from two cells form a gap junction. Gap junctions permit electrical signals to pass directly from one cell to another.