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![Smooth muscle innervation](http://d3e1m60ptf1oym.cloudfront.net/d01eb462-09ca-11e3-ad8a-7b7208bb0aee/smooth_muscle_nerve_large.jpg)
![Reflex arc, unlabeled diagram.](http://d38zjy0x98992m.cloudfront.net/8c4ffa08-087f-11e3-aee0-bfdd0d7513e8/somatic_reflex_unlabeled_large.jpg)
Reflex arc, unlabeled diagram.
Cross section of the spinal cord showing sensory and motor neurons involved in a reflex.
© Alila Medical Media
Image size: 26.0 Mpixels (74.5 MB uncompressed) - 6250x4167 pixels (20.8x13.9 in / 52.9x35.3 cm at 300 ppi)
![Reflex arc, labeled diagram.](http://d38zjy0x98992m.cloudfront.net/879087c6-087f-11e3-9b7e-69c7ad03ac31/somatic_reflex_large.jpg)