U2: Thoracic Cage Word Scramble
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Question | Answer |
Thoracic Cage or Bony Thorax | includes sternum, ribs, and costal cartilages |
Sternum | flat bone to which 10 of 12 pairs of ribs attach via costal cartilages; parts are manubrium, body, and xiphoid process |
Manubrium | superior portion of sternum; medial end of clavicles articulate with it, has suprasternal/jugular notch |
Body | middle and largest portion of sternum |
Xiphoid process | inferior tip portion of sternum; usually blue on models b/c made of hyaline cartilage |
Ribs | 12 pairs; all articulate posteriorly with thoracic vertebrae |
First 7 pairs of ribs | true ribs which attach directly to sternum via costal cartilages |
Last 5 pairs of ribs (pairs 8-12) | false ribs |
Rib pairs 8-10 | false ribs whose costal cartilages do not exten all the way to the sternum, but join the cartilages associated with more superior ribs; have only indirect attachment to the sternum |
Rib pairs 11-12 | false ribs that are more specifically designated as “floating” ribs b/c have no costal cartilages and no attachment to sternum |
Intercostal spaces | space between ribs and costal cartilages that are filled with breathing-related skeletal muscles named external intercostals (asstd. w/ inhalation/inspiration) and internal intercostals (asstd. w/exhalation/expiration) |
Created by:
mbtrimm
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