Caption: Heart muscle with purkinje fibers on the surface of the the heart muscle fibers. 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
Type: SEM
Copyright 2001 Dennis Kunkel Microscopy, Inc.
Keywords: blood,cardiac muscle,circulatory system,heart,heart muscle,muscle,muscle fiber,muscle fibre,muscles,purkinje fiber,purkinje fibre,ventricle,SEM,07.01.08