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

Confocal image of a sea squirt heart. The sea squirt heart is a tube made of a single layer of muscle cells. The contractile elements are the long striations stained red and the nuclei are also red. The green spots indicate gap junctions between the cells, which facilitate the conduction of electrical impulses through the heart, thus coordinating its contraction.

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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.

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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.

This photo displays three different types of cell junctions. 1. Desmosomes hold cells together (protein to protein). They can be found in heart, uterus, or skin cells. 2. Gap Junctions form links between all cells, allowing cytosol to connect. They are found in cardiac cells. 3. Tight junctions stop fluid and other stuff from passing between cells. They can be found in the urinary tract.

The word synapse comes from synaptein which Sir Charles Scott Sherrington and colleagues coined from the Greek syn- (together) and haptein (to clasp). In the nervous system a synapse is a structure that permits a neuron to pass an electrical or chemical signal to another cell (neural or otherwise). Synapses are essential to neuronal function: neurons are cells that are specialized to pass signals to individual target cells and synapses are the means by which they do so. There are two…

Cell image CIL:11243 NCBI Organism: Felis catus Cell Types: cardiac muscle cell Cellular Components: gap junction,intercalated disc Biological Process: cell communication,cell-cell junction organization

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