Thoracic Cavity- Lungs
- bronchodilate*
- vasoconstrict
- inhibit glandular secretion - ANS-Sympathetic fibers of the pulmonary plexus
-Ascends on left side, posterior to aorta up to T9 vertebra and then crosses to the right to empty
in the azygos vein
-Receives 3 inferior intercostal veins (9-11 intercostal spaces), inferior esophageal and
mediastinal veins - ANS-Hemiazygos vein
-at the level of the 8th costal cartilage in the midclavicular line
-at the level of the 10th costal cartilage in the midaxillary line
-at the level of rib 12 dorsally. - ANS-The base of the parietal pleurae is found?
-Begins at the left side of 4th or 5th intercostal space, descends to T7-T8 and empties into
azygos vein
-Left superior intercostal vein drain into this, but generally drains directly into the
brachiocephalic vein - ANS-Accessory Hemiazygos vein
-bronchial veins
-pulmonary veins - ANS-2 types of venous return in lungs
-cervical
-diaphragmatic
-costal
-mediastinal - ANS-parietal pleura 4 parts
-fully occupy thoracic cavity
-Organs of respiration
-Job is gas exchange
-Great site to deliver drugs and toxins as well
-Highly elastic organs in life - ANS-Lungs and their function
-inferior lobe behind
-superior and middle lobes are in front
-horizontal fissure follows 4th rib
-oblique fissure starts from the horizontal fissure in the axillary line and crosses the 5th rib,
terminating at rib 6 (at 6th sternocostal joint) - ANS-Surface anatomy of the right lung
-Lubrication
, -Cohesion - ANS-what is the function of the serous membrane (pleura) in the pulmonary cavity
that produce fluid?
-no horizontal fissure
-only oblique fissure separating superior from inferior lobe
-superior lobe in front, inferior lobe behind - ANS-surface anatomy of the left lung
-Right and left pulmonary cavities
-Central mediastinum which contains everything else in the thorax (heart vessels, lymph nodes,
thymus, esophagus, trachea) - ANS-Thoracic Cavity subdivided into 3 cavities by pleural
membranes
-Unpaired on right side (Formed by union of lumbar vein and subcostal veins)
-Located in the posterior mediastinum
-Receives posterior intercostal veins
-Empties into the SVC
-Also a collateral pathway btw SVC and IVC
-Communicates with vertebral venous plexus
-Also receives mediastinal, esophageal, and bronchial veins - ANS-Azygos veins
(Root of lung)
site where everything (bronchi, vessels, nerves, lymphatics) enters and exits - ANS-Hilum of
lung
(run independently of arteries)
course between bronchopulmonary segments and drain adjacent segments
-also drains the visceral pleura - ANS-the pulmonary veins course where and drain what?
1 (from the thoracic aorta) - ANS-how many aa enter right lung?
1 pulmonary aa (that branches into)--> lobar aa (superior lobar aa), at hilum (they then branch
into)--> tertiary segmental aa - ANS-each lung is supplied by
10 (each with own bronchus and pulmonary aa) - ANS-How many bronchiopulmonary segments
(surgical units) are in right lung?
2 aa - ANS-how many aa enter left lung?
2 lobes and 1 fissure (has the cardiac notch) - ANS-the Left lung has how many lobes and
fissures?
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