Internal intercoastal muscle
Understand the Problem
The question is inquiring about the internal intercostal muscles, which are a part of the respiratory system. It seeks to understand their function, anatomy, or significance in human physiology.
Answer
Pulls down on the rib cage, aiding in expiration.
The internal intercostal muscles are responsible for pulling down on the rib cage to push air out of the lungs during expiration.
Answer for screen readers
The internal intercostal muscles are responsible for pulling down on the rib cage to push air out of the lungs during expiration.
More Information
The internal intercostal muscles play a vital role in respiratory mechanics by decreasing the volume of the thoracic cavity, thereby aiding in the expulsion of air from the lungs. They are crucial in activities like singing and speaking.
Tips
A common mistake is confusing the action of internal intercostal muscles with external intercostal muscles, which are involved in inhalation. Remember, internal intercostals are primarily for expiration.
Sources
- Internal Intercostal Muscles - an overview | ScienceDirect Topics - sciencedirect.com
- Internal intercostal muscles: Attachments, supply, action - Kenhub - kenhub.com
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