thoracic wall

superior border of mediastinum

suprasternal notch to upper border of t!

inferior border of mediastinum

diaphragm

length of mediastinum

sternum to 12 thoracic vertebrae

where is the mediastinum line

sternal angle to t4-t5 intervertebral disc

what does the mediastinum line divide

superior and inferior mediastinum

what does the pericardial sac divide

anterior, middle, and posterior mediastinum

what is the pleural cavity

closed serous sacs/membranes surrounding lungs

what is the mediastinum

movable compartment between pleural cavities, thoracic outlet and root of neck to diaphragm, sternum to verebrae

location of manubrium

t3-t4

location of body of sternum

t5-t8

location of manubriosternal joint (sternal angle)

t4-t5

location of xiphisternal joint

t9

how many ribs

12

what ribs articulate with sternum

1-7

what rib articulates at the sternal angle

rib 2

what ribs have a fused cartilage

8-10 fuse to 7

which ribs are your floating ribs (no attachment to sternum)

11 and 12

what ribs are your typical ribs

2-7

borders of superior aperture

t1 vertebra, 1st ribs, costal cartilages, superior border of manubrium

where is the superior aperture

root of neck

inferior aperture

communicates with abdomen

borders of inferior aperture

t12 vertebra, costal margin, xiphisternal joint