Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Peripheral PARASYMPATHETIC Nervous System (Ex. III)

Question 1

course of preganglionic motor axons and targets

Answer 1

vagus n. (CN X):

• cardiac branches ==> cardiac plexus
• esophageal branches ==> esophageal plexus
• tracheal branches ==> trachea
• bronchial branches ==> pulmonary plexus (bronchi and pulmonary vessels)

Question 2

Where are the ganglion cells of the parasympathetic nervous system located?

Answer 2

scattered in microscopic groups in their target organs –> preganglionic motor axons carried to targets via the vagus n.

Question 3

origin of preganglionic fibers

Answer 3

brainstem