Phrenic nerve

High school (ages 12+)
Human Body

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/phrenic-nerve

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is Phrenic nerve known for?Primarily C4, with contributions from C3 and C5 spinal nerves
2. How big is Phrenic nerve?Central tendon of the diaphragm and mediastinal pleura
3. What is the primary motor function?Exclusive innervation of the diaphragm for respiration
4. What is the clinical significance?Essential for breathing; damage can cause diaphragmatic paralysis and respiratory distress
5. Where does the phrenic nerve come from?It starts in the neck from the C3, C4, and C5 spinal nerves, especially C4.
6. How does the phrenic nerve help us breathe?When it sends a signal, the diaphragm contracts and flattens, making room for air to enter the lungs.

Thoracic cavity: The space within the chest that contains the lungs, heart, and major blood vessels.
Intra-thoracic pressure: The pressure within the chest cavity, which fluctuates during breathing.
Referred pain: Pain felt in a part of the body other than its actual source.
Phrenic nerve palsy: Weakness or paralysis of the diaphragm due to damage to the phrenic nerve.