ribs Flashcards
what rib lines up w inferior angle
rib 7
what are the true ribs
1-7 connect directly to sternum
what are the false ribs
8-10 dont connect directly to sternum they share costal cartilage
floating ribs
11-12 - not connected
atypical ribs
1,2,10-12
typical ribs
3-9
why is rib 1 different
shorter, wider, sharply curved
one articular facet on head (T1)
scalene tubercle for attachment of anterior scalene muscle
grooves for subclavian
attachment for mid scalene
how many facets do ribs 10-12 have
one articular facet
what is costal cartilage made of
made of cartilage cells in a glycoprotein matrix strengthened by collagen
what are the intercostals
external
internal
innermost
aid in posture and respiration
what is the origin/insertion of the external intercostal
lower border of ribs
upper borders of ribs below
origin / insertion of internal intercostals
inner surfaces of ribs and costal cartilage
upper border of adjacent ribs below
what are the 3 openings of the diaphragm
inferior vena cava (T8)
esophagus (T10)
abdominal aorta (T12)
O’s and I’s levator costarum
TP’s C7-T11
ribs 1-12
what is the rib cage composed of
sternum (manubrium, body, xiphoid process)
ribs
joints (costovertebral, costotransverse)
another name for true ribs
vertebrosternal
another name for false ribs
vertebrochondral
another name for floating ribs
vertebral
rib 11,12
no neck
only 1 facet
where is the infrasternal angle
xiphoid process
what are the 4 rib joints
costovertebral
costotransverse
sternocostal
costochondral
sternocostal joint rib 1 type
CARTILAGINOUS
synchondrosis
synarthrosis
articular surfaces of sternocostal joint
costal notch manubrium
anterior end of 1st rIb cartilage
articulating surfaces of costovertebral joint
facet on vertebral body
rib head facet
articulating surfaces of costotransverse joint
TP’s costal facet
articular facet on tubercle of rib
articulating surfaces of sternocostal joint (1st rib)
costal notch manubrium
anterior end 1st rib cartilage
articulating surfaces of sternocostal joint
costal facet sternum
anterior end of 2-7 rib cartilages
O’s and I’s of subclavius
1st rib
middle 1/3 clavicle
articulating surfaces of costochondral joint
lateral edge of costal cartilage and medial end of rib
external intercostals
lower border of ribs
upper border of ribs below
elevates on inspiration
supports intercostal spaces in inspir/expiration
intercostal nerves
what direction do the external intercostals travel
INFERIOR AND MEDIALLY
what direction do the intercostal and innermost fibers run
inferiorly and LATERALLY
o/i innermost intercostals
lower border of ribs
upper border of rib below origin
elevate ribs
which intercostals elevate ribs and which other muscle
external, innermost
levator costarum
during inspiration which muscles contract
diaphragm, external intercostals
what causes air to rush into the lungs
diaphragm and external intercostals contract
this enlarges the thoracic cavity and elevates ribs
what causes air to expire
diaphragm and external intercostals relax
causing elastic tissue in lungs to spring back
