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Z MD1 Respiratory block > Anatomy > Flashcards

Flashcards in Anatomy Deck (28):

what is significant about the right main bronchus compared to the left

the RMB is shorter, wider and more vertical than the left


order of bronchial divisions

Main bronchus - lobar bronchi - segmental bronchi - bronchioles - terminal bronchioles - respiratory bronchiols - alveolar ducts - alveoli


lobe delineations in the left lung

1 fissure oblique fissure - separates upper lobe from lower lobe


what are the imprints on the left lung?

imprints of arterial structures - Aorta and LV


where do the lymphatics of the lungs all end up? and where does it then go?

at the hilar lymph nodes --> then series of lymph nodes at the bifurcation of the trachea --> ascending lymphatic channels along the trachea and up into the thoracic lymphatics


where are pulmonary veins always situated in the hilum

they are always the most anterior and inferior structures in the hilum


What are the two branches of the right main bronchus called before going into the hilum of the lung and where are they situated relative to each other?

Right upper lobe bronchus - sits superior to... Bronchus intermedius


where does the trachea begin

in the neck, at the level of C6


lobe delineations in the right lung

2 fissures horizontal fissure - separates upper lobe from middle lobe oblique fissure - separates lower lobe behind, from upper and middle lobe infront


where is the pulmonary artery in the hilum in the left and right lungs

left - superior to the bronchus right - anterior to the bronchus


what are the imprints on the right lung?

imprints of venous structures - RA, SVC, arch of azygous vein


where are the pulmonary veins situated in the hilum?

one anterior, one inferior


where does the visceral pleura become the parietal pleura?

when it reflects over the hilar structures


how does the trachea descend

inferiorly, through the thoracic inlet, into the superior mediastinum At T4-5 - divides into R and L main bronchus


what is each bronchopulmonary segment supplied by?

segmental bronchus, segmental artery, segmental vein


4 sections of the parietal pleura?

cervical pleura mediastinal pleura costal plerua diaphragmatic pleura


what is the clinical significance of the apical segment of the lower lobe?

this is where any fluid would first develop (as the pathway is the easiest) - this is where we auscultate for fluid


where is the lingular

on the left lung starts at the cardiac notch tongue like projection that hangs down inferiorly from the upper lobe


what is the difference between RMB and LMB in the hilums of the R and L lung

The RMB gives off the right upper lobe bronchus before entering the lung (this means that the pulmonary artery also splits) The LMB does not do this - only 1 bronchial, and 1 arterial structure in the hilum


what surfaces do the visceral and parietal pleura cover?

visceral - thin, serous membrane covering both lungs parietal - thin, serous membrane lines the walls of the inside of the thoracic cavity


what is the shape of a bronchopulmonary segment?

pyramid shape - apex directed to hilum and base on the surface


where are pulmonary arteries placed in the hilum

always anterior or superior to the bronchial tree


what is the purpose of the pulmonary ligament

it is a potential space for the pulmonary veins to expand into if needed


where is the trachealis muscle

on the posterior of the trachea - closes off the cartilage rings


where is the pulmonary plexus?

associated with the bifurcation of the trachea


tell me about the surfaces of the lungs?

- concave inferior surface (sits over the convexity of the domes of the diaphragm) - has a pointed apex - has a rounded costal/lateral surface that sits against the ribs - inner surface bears the hilar structures and bears the imprint of the structures


what is in the hilum?

1) branches of the tracheobronchial tree 2) vascular supply (pulmonary artery, bronchial arteries, pulmonary veins, bronchial veins) 3) neural 4) lymphatics


nerve supply to the lungs

autonomic supply (both SNS and PNS) - regulates both mucus production and the diameters of the bronchioles