Innervation
- Extrinsic innervation connects the gastrointestinal tract with the brainstem and spinal cord.
- Efferent fibers carry commands from the central nervous system toward gastrointestinal muscle and glands.
- Afferent fibers carry sensory information from gastrointestinal chemoreceptors and mechanoreceptors toward the central nervous system.
- Chemoreceptors detect chemical features of luminal contents.
- Mechanoreceptors detect stretch and other mechanical changes.
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