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Only cardiac muscle has this particular appearance, which is given to it by something called intercalated discs. Cardiac muscle also consists of single muscle cells, called Cardiomyocytes; where something such as skeletal muscle cells are MULTInucleated (more than one cell nucleus).

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Cardiac muscle fibrils, scanning electron micrograph. Mitochondria (green) supply the muscle cells with energy.

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No bones about it; your bones can’t do much without muscles to move them. You have three major types of muscle tissue known as skeletal, smooth, and cardiac muscle. Learn about all 11 organ systems with the Amoeba Sisters! http://www.youtube.com/watch?v=nnjmrrQ6xOs

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from 9GAG

The human heart stripped of fat and muscle, with just the angel veins exposed

The human heart stripped of fat and muscle I personally saw this sort of stuff at a body art display in Austin, TX. Absolutely stunning to see the whole circulatory system without muscles, fat, skin, tendons, etc. Go if you ever get a chance! ~Aprilj

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Heart muscle cells (shown in green), regress to a more youthful state after injury, start dividing again (indicated by a red marker) to replenish lost cells and then mature a second time into cardiomyocytes.

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THREE TYPES OF MUSCLE TISSUE - IILyear4

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Warning: Feels will be destroyed *cries*<---I can see this actually happening frequently with him while he is in prison

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This photo displays cardiac muscle tissue. This tissue type is striated, branched, and has 1-2 nuclei. Cardiac muscle tissue can be recognized by intercalated disks (dark thickened part). Cardiac muscle cells are bigger than smooth muscle cells and smaller than skeletal muscle cells. They control involuntary movement (the heart).