Answer:
The answers are: phrenic nerve, cervical spinal nerve, branches of the cervical plexus, the thoracic, and the root of the lung to reach the diaphragm.
Step-by-step explanation:
One important branch of the cervical plexus is the phrenic nerve, which is formed primarily from the cervical spinal nerve and some contributing axons from branches of the cervical plexus.
This nerve travels trhought the thoracic cavity to innervate the root of the lung to reach the diaphragm and its important for breathing.
This question is about the network of nerve fibres that supplies innervation to some of the structures in the neck and trunk.