thoracic cavity

Question 1

what are the floating ribs

Answer 1

11 and 12

Question 2

what are the false ribs

Answer 2

8-12

Question 3

what are the 6 contents of the thoracic cavity

Answer 3

lungs
heart
trachea
great vessels
liver
spleen

Question 4

what are the functions of the thoracic wall

Answer 4

protection of thoracic contents
facilitation of breathing

Question 5

true or false:
the head of the rib is posterior

Answer 5

true

Question 6

what are the true ribs

Answer 6

1-7

Question 7

where does a tracheostomy go

Answer 7

jugular notch

Question 8

what are the “atypical ribs”

Answer 8

1, 2, 11, 12
these are the ones he will ask about!

Question 9

which rib has no neck or tubercles

Answer 9

12th

Question 10

what type of cartilage attaches the ribs to the sternum

Answer 10

costal cartilage

Question 11

what artery and vein runs beneath each rib

Answer 11

posterior intercostal artery and vein

Question 12

true or false
discs in the thoracic area are rarely herniated

Answer 12

true

Question 13

aponeurosis

Answer 13

connective tissue that takes the place of tendon

Question 14

what is the main muscle of inspiration

Answer 14

diaphragm

Question 15

what is the main muscle of expiration

Answer 15

almost independent (but mostly abdominal wall, internal + external obliques)

Question 16

what direction do ribs move with inspiration

Answer 16

up

Question 17

what direction do ribs move with expiration

Answer 17

down

Question 18

what is most posterior

Answer 18

aorta

Question 19

what is most anterior

Answer 19

IVC

Question 20

what is in the middle

Answer 20

esophagus

Question 21

what 10 muscles help with INspiration

Answer 21

pec major
pec minor
serratus anterior
scalenes
sternocleidomastoid
anterior abdominal muscles (internal/external oblique, rectus abd)
external intercostals
innermost intercostals
levator costarum
subcostals

Question 22

where do the scalenes attach

Answer 22

anterior and middle: 1st rib
posterior: 2nd rib

Question 23

what 3 muscles help with expiration

Answer 23

internal intercostals (especially during exercise)
serratus posterior inferior
transversus thoracis

Question 24

what is another term for ventral rami

Answer 24

intercostal nerve
(nerve that runs in intercostal space)

Question 25

what is ventral rami of T12 also known as

Answer 25

subcostal nerve

Question 26

dermatome of T4

Answer 26

nipple level

Question 27

dermatome of T10

Answer 27

belly button level

Question 28

dermatome of T7

Answer 28

xiphoid level

Question 29

what arteries supply the thoracic wall

Answer 29

anterior and posterior intercostals

Question 30

what system starts in pelvis, picks up blood, dumps into SVC, is mostly on the right side

Answer 30

azygos system