IMG_3482.jpeg

# Figure 3.29 The Autonomic Nervous System The schematic figure shows the target organs and functions served by the sympathetic and parasympathetic branches of the autonomic nervous system. ## Sympathetic **Thoracic and Lumbar** * **Eyes:** Dilates pupil, inhibits tears * **Salivary Glands:** In...

# Figure 3.29 The Autonomic Nervous System The schematic figure shows the target organs and functions served by the sympathetic and parasympathetic branches of the autonomic nervous system. ## Sympathetic **Thoracic and Lumbar** * **Eyes:** Dilates pupil, inhibits tears * **Salivary Glands:** Inhibits salivation * **Lungs:** Constricted airways * **Heart:** Speeds heartbeat * **Sweat Glands:** Stimulates sweating * **Liver:** Stimulates glucose release * **Blood Vessels (skin):** Constrict blood vessels * **Digestive System:** Inhibits digestive system * **Adrenal Medulla:** Stimulates secretion of epinephrine and norepinephrine * **Stomach:** Stimulates digestive system's action. * **Large Intestine:** Stimulates digestive system * **Small Intestine:** Stimulates digestive system * **Pancreas:** Stimulates digestive system * **Rectum:** Not directly affected, but part of the digestive system ## Parasympathetic **Cranial and Sacral** * **Eyes:** Constrict pupils, produces tears * **Salivary Glands:** Stimulates salivation * **Lungs:** Not directly affected, part of respiratory system * **Heart:** Slows heartbeat * **Liver:** Not directly affected * **Blood Vessels (skin):** Not directly affected * **Digestive System:** Stimulates digestive system * **Stomach:** Stimulates digestive system * **Pancreas:** Stimulates digestive system. * **Rectum:** Relax the rectum and bladder * **Bladder:** Contracts bladder * **Reproductive Organs:** Stimulates sexual arousal and orgasm **Note:** The figure shows the different parts of the autonomic nervous system and how it affects various organs and systems in the body. The arrows indicate the direction of stimulation or inhibition. Also, the figure shows the location of the preganglionic and postganglionic neurons for both the sympathetic and parasympathetic systems.