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Illustration of human nervous reflex arc

Illustration of human nervous reflex arc


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Science Photo Library

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Illustration of human nervous reflex arc

Illustration depicting the human nervous reflex arc, showing the components involved in the muscular response of the arm to the stimulation caused by the heat of a candle flame against the hand. The pain impulse passes via a sensory nerve from the hand to synapses (junctions) in the white matter of the spinal cord (top right) which connect with two motor nerves that supply the biceps (right) and triceps muscles in the upper arm. Thus the sensation of pain caused by the heat of the flame provokes an upward jerk of the hand

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 6446959

© FRANCIS LEROY, BIOCOSMOS/SCIENCE PHOTO LIBRARY

Nerve Nerves Nervous Stimulation System


EDITORS COMMENTS
This print from Science Photo Library showcases an intricate illustration of the human nervous reflex arc. It vividly depicts the various components involved in the muscular response of the arm to a stimulating event, specifically the heat of a candle flame against the hand. The image beautifully captures how pain impulses travel through sensory nerves from the hand to synapses located in the white matter of the spinal cord. These synapses serve as junctions that connect with two motor nerves responsible for supplying muscles in both the biceps and triceps regions of our upper arm. As we delve into this remarkable visual representation, it becomes evident that when subjected to intense heat like that produced by a flame, our body's natural defense mechanism is triggered. The sensation of pain caused by this thermal stimulus provokes an immediate upward jerk or movement of our hand. Through this illustration, we gain valuable insights into how our nervous system functions and responds to external stimuli. It highlights not only its complexity but also its efficiency in protecting us from potential harm. Science Photo Library has once again captured a momentous scientific phenomenon with utmost precision and clarity, providing us with an invaluable resource for studying and understanding one aspect of human anatomy –the fascinating world within our own bodies.

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