Lungs and Mediastinum Flashcards
Trachea begins at ____ and divides at ______
C6
Sternal Angle (T4-T5)
Which primary bronchus is longer and thinner (5 cm) and which is shorter and wider (2.5 cm)?
Longer - Left
Shorter - Right
Most common location of aspirated foreign bodies
Right primary bronchus
Name of place where trachea bifurcates and “cough” reflex is
Carina
Right primary bronchus passes inferior to
Azygos vein
Left primary bronchus passes inferior to
Aortic arch
Lungs are covered by ________ and separated from parietal pleura by ________ in the _________
Visceral pleura
Pleural fluid
Pleural cavity
Helps reduce friction when breathing
pleural fluid
potential pleural space - inferior and lateral
costodiaphragmatic recess(es)
Lobes and fissures of right lung
Lobes: - Superior - Middle - Inferior Fissures: - Oblique - Horizontal (aka secondary or transverse)
Lobes and fissures of left lung
Lobes: - Superior - Inferior Fissures: - oblique
Lingula is formed by the ______ ______ in the ______ lobe of the _______ lung
Cardiac notch
Superior
Left
Surfaces of the lung (4)
Cervical
Costal
Mediastinal
Diaphragmatic
The root of the lung contains (7)
Pulmonary ligament Pulmonary arteries Pulmonary veins Bronchial arteries and veins Bronchus Nerves Lymphatics
Depress of lung where root structures enter/exit
Hilum
Carries deoxygenated blood from the heart to the lungs
Pulmonary artery
Carries oxygenated blood from the lungs to the heart
Pulmonary vein
In the right lung, the pulmonary artery is _______ to the bronchus
Anterior
In the left lung, the pulmonary artery is _______ to the bronchus
Superior
The bronchial arteries are branches of the ______ _______.
The right has _____ and the left has _____ (______ and ______)
Thoracic aorta
One
Two (Superior and Inferior)
In respiratory tree, the trachea and vessels divide into:
Primary bronchi –> Secondary/Lobar bronchi –> Tertiary/Segmental bronchi
Tertiary/Segmental bronchi each from a _________ ________, which contains (3) _____, ______, ______
Bronchopulmonary segment
Its own artery, vein, and 3* bronchus
The surgical unit of the lung
bronchopulmonary segment
The pulmonary plexus is made of (3)
PANS
SANS
visceral afferents
vasoconstrictors and bronchodilators (lots of oxygen & inhibit mucus secretion)
Sympathetics
vasodilators, bronchoconstrictors, secretomotor, and afferents (more mucus secretion - less oxygen/more blood)
Parasympathetics
Cough reflex is found
around the carina - irritant receptor
Respiratory control is done by
stretch receptors in the bronchial tree
Touch and pain are controlled by
nerves in the respiratory epithelium
Superficial lymph plexus is found
within visceral pleura
Deep lymph plexus is found _______ and drains into _________
within the lining of the bronchi
tracheobronchial/carinal nodes
Lymph nodes of lungs (4)
Superior tracheobronchial
Pulmonary
Inferior tracheobronchial
Bronchopulmonary (Hilar)
Lymph vessels of lungs (3)
Right lymphatic trunk
Bronchomediastinal trunks
Thoracic Duct
Thick partition of tissue in and on each side of the media plane
Mediastinum
space between the two pleural sacs which contains all the structures of the thorax except the lungs and pleura, includes heart and pericardium
Mediastinum
Divisions of mediastinum
Superior Inferior - Anterior - Middle - Posterior
Mediastinum divides into superior and inferior at the _____ ______
Sternal angle
There ___ brachiocephalic VEINS and ____ brachiocephalic ARTERY
2
1
Branches of aortic arch
Brachiocephalic
Left common carotid
Left subclavian
Vagus nerves like directly lateral to the
carotid arteries
Phrenic nerve originate from ___ ___ ___ and innervate the ________
C4, C5, C6
diaphragm
The brachiocephalic veins (R and L) drain into the
Superior vena cava
which brachiocephalic vein is longer?
left
Lies in posterior manubrium, superior to the heart.
Regresses to fat and is only ~10% functioning in adulthood.
Thymus
Branch of vagus nerve that goes under aortic arch and back up to larynx
Left Recurrent Laryngeal Nerve
Where can you find the thoracic duct?
“Duck between two gooses”
abdomen up to thorax between the azygos vein and the esophagus
Inferior mediastinum is separated into
Anterior
Middle
Posterior
Middle, inferior mediastinum contains the
pericardium and heart
phrenic nerves
Branches of the descending aorta
Left: - Posterior intercostal arteries - superior phrenic artery (last branch) Right: - Right bronchial artery - esophageal arteries
The thoracic duct travels from the _______ _______, which is just below the diaphragm
Cisterna chyli
Located or right side of body
Main vein of posterior thoracic wall
Drains into IVC and SVC
Azygos vein
Superior branch of azygos vein
Drain 4th - 8th IC spaces
Crosses to azygos at T7/T8
Accessory hemiazygos
Inferior branch of azygos vein
Drains 9th - 11th IC spaces
Crosses to azygos at ~T9 (varies IRL)
Hemiazygos
Drain the left side of the posterior thoracic wall
Accessory hemiazygos and Hemiazygos veins
Restrictions of esophagus (2)
Bronchial and aortic
Diaphragmatic
Nerves of mediastinum (3 groups)
Esophageal plexus
- Includes Vagus Nerve (CN X)
Aortic plexus
Thoracic splanchnic nerves
- Greater - chain ganglia T5 - T9
- Lesser - chain ganglia T10 - T11
- Least - chain ganglia T12
Lymph nodes of mediastinum (3)
Posterior mediastinal
Intercostal
Diaphragmatic
Alectasis
lung collapse
Pneumothorax
entry of air into pleural cavity
Pleural effusion
fluid between lungs and chest (“water on the lungs”)
- compresses lungs
Pulmonary embolism
blockage of pulmonary artery