Thorax, Sternum, Ribs Flashcards
what is the rib cage made up of
Sternum and ribs
what does the thorax do
offers protection to vital structures
what is the thoracic inlet?
superior opening (small)
what is thoracic outlet?
inferior opening, wide
what closes the thoracic outlet?
diaphragm
what are the 3 main parts to the sternum
manubrium, body and xiphoid process
what is another name for the sternum
breastbone
what 3 landmarks are found at the manubrium
1) jugular (interclavicular) notch
2) clavicular notch
3) notch for 1st rib
what should one watch for when doing CPR compressions. why?
Xiphoid process because it is very fragile
how many ribs are there
12 pairs (24 ribs)
the ribs articulate posteriorly with ______ vertebrae
thoracic
the ribs articulate anteriorly with ______
hyaline/costal cartialge
what are the 2 classifications of ribs
1) true ribs
2) false ribs
true ribs
- ribs 1-7
- costal cartilage articulates directly with sternum
False ribs
- ribs 8-12
- articulate with costal cartilage of rib above (rib 8-10) or with nothing at all (11-12)
what is the name given to ribs 11 and 12. why?
Floating ribs - lack of anterior articulation
what is the head of the rib rounded for?
articulation with thoracic vertebrae
demifacets of the ribs are for articulation with what
thoracic vertebrae
where is the tubercle of the rib located
just distal to the head of the rib
where does the body/shaft of ribs curve
anteriorly
4 sternocostal articulations
1) rib 1 - below clavicular notch
2) rib 2 - sternal angle
3) ribs 3-6 - body of sternum
4) rib 7 - xiphoid process
how many synovial joints per rib?
3
what are the 2 articulations for the costovertebral joints?
rib head articulates with demifacets of adjacent thoracic vertebra, tubercle articulates with costal facet on the transverse process of vertebra
what is the specific name for the tubercle articulation with costal facet on the transverse process of vertebra
costrotransverse joint
