Organ system: Autonomic nervous system
Function
- "Rest and digest"
- To reduce heart rate and stroke volume
- To dilate the capillaries, reduce peripheral vascular resistance, and decrease blood pressure
- To reduce respiratory rate
- To constrict the pupils (less light enters the retina)
- To promote gastrointestinal activity
- To initiate penile erection or vaginal tumescence
Mediators
- Cranial nerves: CN X (The vagus nerve)
- Spinal nerves: The pelvic splanchnic plexus
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