All are the atypical ribs except: 1st rib, 2nd rib, 9th rib, 10th rib. 2- Anterior intercostal membrane is the continuation of: External intercostal muscle, Internal intercostal mu... All are the atypical ribs except: 1st rib, 2nd rib, 9th rib, 10th rib. 2- Anterior intercostal membrane is the continuation of: External intercostal muscle, Internal intercostal muscle, Intercostalis intimi muscle, Subcostalis muscle. 3. During quiet respiration, the elevation of ribs is done mostly by the contraction of: Internal intercostal muscles, External intercostal muscles, Intercostalis intimi muscles, Subcostalis muscles.
Understand the Problem
The question is asking about atypical ribs, intercostal muscles, and their role during quiet respiration. Specifically, it requires identifying which ribs are typical and a question regarding muscle functions.
Answer
1) 9th rib; 2) External intercostal muscle; 3) External intercostal muscles.
The answers are: 1) 9th rib; 2) External intercostal muscle; 3) External intercostal muscles.
Answer for screen readers
The answers are: 1) 9th rib; 2) External intercostal muscle; 3) External intercostal muscles.
More Information
Ribs 1, 2, 10, 11, and 12 are considered atypical due to their unique features. The external intercostal muscles are involved in inspiration by elevating the ribs.
Tips
Confusing the role of intercostal muscles during respiration is common. Remember that external intercostal muscles aid in inspiration, while internal intercostals assist in expiration.
Sources
- The Ribs - Rib Cage - Articulations - Fracture - TeachMeAnatomy - teachmeanatomy.info
- Intercostal spaces: Anatomy, contents and boundaries - Kenhub - kenhub.com
- Muscles of Respiration - Physiopedia - physio-pedia.com
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