thoracic cavity Flashcards
what are the floating ribs
11 and 12
what are the false ribs
8-12
what are the 6 contents of the thoracic cavity
lungs
heart
trachea
great vessels
liver
spleen
what are the functions of the thoracic wall
protection of thoracic contents
facilitation of breathing
true or false:
the head of the rib is posterior
true
what are the true ribs
1-7
where does a tracheostomy go
jugular notch
what are the “atypical ribs”
1, 2, 11, 12
these are the ones he will ask about!
which rib has no neck or tubercles
12th
what type of cartilage attaches the ribs to the sternum
costal cartilage
what artery and vein runs beneath each rib
posterior intercostal artery and vein
true or false
discs in the thoracic area are rarely herniated
true
aponeurosis
connective tissue that takes the place of tendon
what is the main muscle of inspiration
diaphragm
what is the main muscle of expiration
almost independent (but mostly abdominal wall, internal + external obliques)
what direction do ribs move with inspiration
up
what direction do ribs move with expiration
down
what is most posterior
aorta
what is most anterior
IVC
what is in the middle
esophagus
what 10 muscles help with INspiration
pec major
pec minor
serratus anterior
scalenes
sternocleidomastoid
anterior abdominal muscles (internal/external oblique, rectus abd)
external intercostals
innermost intercostals
levator costarum
subcostals
where do the scalenes attach
anterior and middle: 1st rib
posterior: 2nd rib
what 3 muscles help with expiration
internal intercostals (especially during exercise)
serratus posterior inferior
transversus thoracis
what is another term for ventral rami
intercostal nerve
(nerve that runs in intercostal space)
what is ventral rami of T12 also known as
subcostal nerve
dermatome of T4
nipple level
dermatome of T10
belly button level
dermatome of T7
xiphoid level
what arteries supply the thoracic wall
anterior and posterior intercostals
what system starts in pelvis, picks up blood, dumps into SVC, is mostly on the right side
azygos system
