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Illustration of electrical conduction in the heart
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Illustration of electrical conduction in the heart
Electrical conduction in heart. Illustration of a human heart, showing the specialised tissue that conducts the electrical signals governing heart- beats. The heartbeat starts in the hearts natural pacemaker, the sinoatrial (SA) node (green). This small area of specialised muscle cells emits an electrical impulse about 70 times a minute. The impulse spreads through the muscles of the atria (upper heart chambers), making them contract, and is carried via special fibres to the atrioventric- ular (AV) node (orange). The AV node delays the impulse to allow the ventricles (lower heart cham- bers) to fill, before effecting ventricular con- traction via branches of the bundle of HIS (red)
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6420792
© JOHN BAVOSI/SCIENCE PHOTO LIBRARY
Natural Pace Maker Sinoatrial Node
EDITORS COMMENTS
This print from Science Photo Library beautifully captures the intricate process of electrical conduction in the human heart. The illustration showcases a detailed depiction of a human heart, highlighting the specialized tissue responsible for conducting electrical signals that govern our heartbeat. At the core of this remarkable system lies the sinoatrial (SA) node, depicted in vibrant green. This natural pacemaker emits an electrical impulse approximately 70 times per minute, initiating each heartbeat. From here, the impulse spreads through the muscular walls of the atria - the upper chambers of the heart - causing them to contract and pump blood efficiently throughout our bodies. The journey continues as special fibers carry this vital signal to another crucial component known as the atrioventricular (AV) node, represented by an orange hue. The AV node plays a pivotal role by delaying this impulse momentarily, allowing ample time for ventricles - lower chambers of our hearts - to fill with blood before contracting effectively. To ensure seamless coordination between all parts involved, branches originating from bundle of HIS (depicted in striking red) transmit these impulses further into ventricles and facilitate their synchronized contraction. This stunning artwork not only highlights key anatomical structures but also provides valuable insights into how our hearts function on an electrical level. It serves as a testament to both scientific knowledge and artistic representation while emphasizing one's appreciation for nature's incredible design within us.
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