Thoracic Wall and Pleural Cavities Flashcards
the region between the neck and abdomen
the thorax
boundaries of the superior thoracic aperture
body of 1st thoracic vertebra
1st pair of costae
manubrium
boundaries of inferior thoracic aperture
body of 12th thoracic vertera
11th and 12th costae
xiphoid process and costal cartilages 7-10
the thorax and the abdomen are separated by what structure
the respiratory diaphragm
although the dome of the diaphragm rises to the level of the 5th intercostal space on the right, it ends at the __ intercostal space on the left
6th
what four structures does the manubrium articulate with
clavicles at SC joints
1st pair of ribs
2nd pair of ribs at sternal angle
body of sternum at sternal angle
the function of the manubriosternal joint is to
increase respiration and allowing expansion of the thoracic cavity through hinge-like movement anteriorly and posteriorly
true ribs include those that
1-7
have costal cartilages attached directly to the sternum
false ribs
8-10
have costal cartilages attached indirectly to the sternum
floating ribs
11-12
have no attachment to the sternum
three structures a rib articulates with at the costovertebral joint
1) superior costal facet of same numbered vertebrae
2) inferior costal facet of superior vertebrae
3) adjacent IV disc uniting the two
at the costotransverse joint, the tubercle of the rib articulates with
the transverse process of the corresponding vertebra
costotransverse joints permit what kind of movement
rotation at 1-7
glide at 8-10
permit both elevation of ribs during forced inspiration and depression during forced expiration
external intercostal boundaries
tubercles of ribs to junction of costal cartilages with bony ribs
external intercostal fiber directions
inferomedial
therefore elevate ribs
external intercostal actions
elevate ribs
internal intercostal boundaries
middle layer; extends from sternum to mid-axillary line
internal intercostal fiber directions
inferolateral
therefore depress ribs
internal intercostal actions
depress ribs
innermost intercostal boundaries
angles of ribs to just anterior of mid-axillary line
innermost intercostal fiber directions
inferolateral
depress ribs
innermost intercostal actions
depress ribs
transversus thoracis function
depresses ribs
transversus thoracis boundaries
posterior surface of the lower half of the body of the sternum and the xiphoid process of the costochondral junction of ribs 3-6
intercostal nerves consist of ____ rami of T_ - T__
intercostal nerves consist of ventral primary rami of T1-T11
intercostal, pectoral and serratus anterior muscles are supplied by what arteries
posterior intercostal arteries
(branches of the descending aorta) located between the two deepest layers of intercostal muscles in intercostal spaces 3-11
intercostal spaces 1-2 are supplied by
superior thoracic artery
superior intercostal arteries (branches of costocervical trunk)
anterior intercostal arteries (from the internal thoracic a) supply
skin, internal intercostal muscles, thymus gland and breasts
found in intercostal spaces 1-6
anterior intercostal arteries to intercostal spaces 7-9 are derived from
musculophrenic a - a branch of the internal thoracic
right and left pleural cavities are separated by
mediastinum
parietal pleura lines the pleural cavity. the structures it determines its name in that region
_____ is attached to ribs/intercostal spaces
_____ adheres the mediastinum
_____ covers the superior surface of the diaphragm
_____ lines the pleural cavity above the level of the 1st ribs
costal pleura
mediastinal pleura
diaphragmatic pleura
cervical pleura
the lungs are covered with a layer of pleura called
visceral pleura
where the costal and mediastinal pleura become continuous posteriorly is a line of reflection called the _____
vertebral reflection
the costal and mediastinal pleura also become continuous anteriorly at a line of reflection called
the sternal reflection
the costa;l and diaphragmatic pleura become continuous inferiorly at a line called
the costal reflection
pleural recess are areas where
two layer of parietal pleura form an acute angle and are in direct contact with each other
the recess located laterally along the costal reflection
right and left costodiaphragmatic recess
the recess located anteriorly along the sternal reflection
the left costomediastinal recess
the lungs are found in the pleural ____
sacs - a space contained within the visceral pleura
the costal pleura is innervated by
the intercostal nerves
the mediastinal pleura and diaphragmatic pleura is innervated by
the phrenic nerve
