The ____________________ nerve is responsible for innervation of the diaphragm.

Question

BlackTom AI · Accepted Answer

The question asks for the carrier nerve that innervates the diaphragm.
First, the diaphragm’s motor innervation is provided by the phrenic nerve, which originates from the cervical spinal roots C3–C5 and travels through the thorax to reach the diaphragmatic muscle.
Understanding the role of the phrenic nerve helps explain its critical function in respiration, since motor signals from this nerve cause the diaphragm to contract and relax during breathing.
While other nerves in the thoracic region, such as the intercostal nerves, are involved in innervation of the thoracic wall and provide some cutaneous sensation, they do not innervate the diaphragm as their primary function.
Additionally, the vagus nerve contributes to autonomic control of thoracic and abdominal organs but does not provide motor innervation to the diaphragm itself.
In summary, the diaphragm is innervated by the phrenic nerve, making it the correct and defining answer for this prompt.

BIOLOGY 211-B09C HW #11: Nervous Tissue, Spinal Cord, and Spinal Nerves

The ____________________ nerve is responsible for innervation of the diaphragm.

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