Heart muscle with purine fibres, SEM

Heart muscle with purine fibres, SEM

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Caption: Heart muscle with purine fibres on the surface of the heart muscle fibres, coloured scanning electron micrograph (SEM). Purkinje fibres are modified cardiac muscle fibres which originate from the atrioventricular node and spread into the two ventricles. They transmit the electrical impulse from the atrioventricular node to the ventricles enabling their almost simultaneous contraction. The spread of excitation through the ventricles from the atrioventricular node is extremely rapid, moving at one to four meters per second. Magnification: x700 when shortest axis printed at 25 millimetres.

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Keywords: 20610a, blood, cardiac, cardiac muscle, cardiac purine fibre, cardiac purine fibres, circulatory system, colored, coloured, false-colored, false-coloured, heart, heart muscle, heart muscle fibre, heart muscle fibres, heart purine fibre, heart purine fibres, human, human body, human heart, muscle, muscle fibre, muscle fibres, muscles, purine fibre, purine fibres, purkinje fibres, scanning electron micrograph, sem, ventricle

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