|
|
 |
 |
Red blood cells tightly packed in a capillary from the heart muscle. A small Purkinje fiber (blue) is present on the surface of the capillary. Purkinje fibers are modified cardiac muscle fibers that originate from the atrioventricular node and spread into the two ventricles. They transmit the electrical impulse from the atrioventricular node to the ventricles enabling an 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.
Image and text copyright © Dennis Kunkel. All rights reserved. |
|
|
|
|
|
|
|
|
|
