Gross (04.20) Thorax, Lungs & Middle Mediastinum Flashcards
the thorax mainly acts as a ____
conduit for vessels
anterior landmark for distinction of inferior and superior mediastinum
sternal angle (2nd rib)
the aortic arch is ____ to sternal angle
superior
what are the three cavities of the thoracic cavity?
- 2 pleural cavities
- media stinum
the manubrium has a clavicular notch for what joint?
sternoclavivular joint
the body of the sternum joins the ___ at the sternal angle
manubrium
lowest point of the sternum
xiphoid process
the head of each ribs articulate with 2 _____ ____ and 1 ____ and is found posteriorly
- vertebral bodies
- disc (intervertebral)
the tubercle of ribs articulate with 1 ____ process
transverse
*is used for stabilization
the part of the body of ribs with the greatest curvature
angle
formed on ribs by intercostal v, a, and n
*important to keep in order (think VANS)
costal groove
the pectoral regions are composed of what two things?
- secretory glands
- superficial fascia
the internal thoracic a goes from ___ to ____ intercostal spaces
2-4
lymphatics of the pectoral region drain what two nodes?
- parasternal
- axillary
what intercostal nerves from the pectoral region carry cutaneous (GS) innervation
-lateral and anterior of 4-6th intercostal nn
what intercostal nerves from the pectoral region carry cutaneous (GS) innervation
-lateral and anterior of 4-6th intercostal nn
pectoral region is a region of mm attachment between ____ ___ and ___ ___
- upper limb
- anterior chest
m of pectoral region that is divided into clavicular and sternocostal heads
pectoralis major
the pec minor m is enveloped in ____ ____
clavipectoral fascia
____ intercostal mm have fibers that go like hands into pockets
external
____ intercostal mm have fibers that are perpendicular to hands going into pockets
internal
the _____ intercostal mm are the deepest of the three
innermost
____ m are located deep and span two or more intercostal spaces
subcostal
m that looks like a fan and is attached to body and xiphoid process of sternum
transversus thoracis
what two mm are responsible for inspiration? raising the ribs
- serratus posterior superior
- external intercostal
what mm are depressors of the ribs?
- internal intercostal
- innermost intercostal
- serratus posterior inferior
the VAN is in the intercostal groove between what 2 mm?
- internal intercostal
- innermost intercostal
____ nerve, artery, and vein are located just ABOVE each rib
collateral
____ nerve, artery, and vein are located just ABOVE each rib
collateral
at the ___ of the rib there is _____ between the intercostal VAN and collateral VAN
- angle
- anastomoses
____ pleura is very sensitive to pain
parietal (via intercostal and phrenic nerves)
what are the true ribs?
1-7
what are the false ribs?
8-12
what are the floating ribs
11 and 12
both layers of pleura (visceral and parietal) are continuous with one another where?
root of the lung (closer to mediastinum)
pathological fluid that may fill the pleural cavity
effusion
pleural effusions are visible on ___ ___
chest films (can obscure lung in film)
the pleural cavities are ___ cavities
potential
the pleural cavities are ___ cavities
potential
accumulation of AIR in pleural cavity that collapses the lung due to its OWN ELASTICITY
Pneumothorax
accumulation of BLOOD in pleural cavity that may cause adhesions and INFECTIONS
hemothorax
inflammation of the pleura usually leads to formation of ___ ___ and can produce exquisite ___ relative to PARIETAL pleura
- pleural adhesions
- pain
aspiration of fluids on by invading the midaxillary line in between ribs SIX or SEVEN
thoracentesis (pleural tap)
during a thoracentesis, if a needle is inserted in ICS 8 or 9 what may happen?
it could pierce spleen, diaphragm, or liver
the ____ lung has 3 lobes
right (upper, middle, lower)
the ___ lung has 2 lobes
left
fissures on both lungs
oblique (major) fissure
the horizontal fissure (minor) is on the ___ lung only
right (makes sense bc it has another lobe)
the horizontal fissure (minor) is on the ___ lung only
right (makes sense bc it has another lobe)
connects lung to mediastimun
root of the lungs
the root of the lungs consist of what two things?
- bronchi
- pulmonary vessels
the inferior sleeve of the root of the lungs is mostly ___ and collapsed, contains only a few lymph vessels which is termed the ____ ___
- empty
- pulmonary ligament
the trachea splits into two ____ ____
primary (main) bronchi
the primary bronchi split into 2 (left) or 3 (right) ____ ____
secondary (lobar) bronchi
the secondary bronchi split into 8-10 ___ ____
tertiary (segmental) bronchi
the sympathetic trunks are ______ and contribute to anterior and posterior pulmonary plexuses. it is responsible for ___ the bronchioles
- paravertebral
- dilation
the vagus n passes ___ to the root of the lungs. it contributes to the anterior and posterior pulmonary plexuses. it is responsible for ___ the bronchioles
- posteriorly
- constriction
n that passes anteriorly to root of the lungs and is closely applied to pericardial sac
phrenic nn
run w the phrenic nn and are branches of the internal thoracic aa and brachiocephalic vv
pericardicophrenic vessels
aa that supplies nutrients to bronchi and lungs
bronchial aa
aa that supplies nutrients to bronchi and lungs
bronchial aa
lymph drains from lungs via ____ nodes and R/L _____ trunks
- tracheobronchial
- bronchomediastinal trunks
broad central partition separating 2 pleural cavities
mediastinum
4 smaller regions of the mediastinum
- superior
- inferior anterior
- inferior middle
- inferior posterior
the mediastinum extends from the ___ ___ to the ____
- thoracic inlet
- diaphragm
the fibrous portion of the fibrous sac is attached to ____ inferiorly
diaphragm
*this is the outter part that is very strong (fibrous and protective)
the serous portion of the fibrous sac is divided into ___ and ____ layers
- parietal
- visceral (is our epicardium)
the pericardium encloses the heart and is pierced by the roots of what 8 vessels?
- SVC
- IVC
- aorta
- pulmon trunk
- 4 pulmon veins
the pericardium encloses the heart and is pierced by the roots of what 8 vessels?
- SVC
- IVC
- aorta
- pulmon trunk
- 4 pulmon veins
located inside the pericardial sac that is a potential space btw serous and parietal layers and contains only a small amount of serous fluid
pericardial cavity
accumulation of excess fluid in the pericardial cavity
pericardial effusion
results in the compression of the heart and is common in conjunction with congestive heart failure
pericardial effusion
arteriole bleeding into pericardial cavity leads to ___ ___ which is compression of the heart and roots of great vessles
-cardiac tamponade