| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 3,917,539,755 visitors served. |
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
Respiratory Muscles |
Also found in: Medical | 0.01 sec. |
|
|
Respiratory Muscles
the skeletal muscles that increase and decrease the volume of the thorax during respiration. The main work of the respiratory muscles is done during inspiration, since expiration occurs passively, as a result of the pull of the thoracic walls and the elasticity of the lungs and intercostal muscles. (The internal intercostal muscles and the abdominal muscles participate in labored exhalation.) The diaphragm is the principal muscle used in inspiration, in which the external intercostal muscles also participate. An increased rate of inspiration is promoted by certain muscles of the neck and the superficial muscles of the chest. Also involved in labored respiration are certain muscles of the back and the shoulder girdle. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
|
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup |
|---|