Mediastinum Heart and Lungs Flashcards
Right Lung Features
3 lobes (superior, middle, and inferior)
oblique and horizontal fissure
apex
Left Lung Features
2 lobes (superior and inferior)
oblique fissure
apex
lingula
R. Lung Medial
superior vena cava– where BCV come together
esophagus impression
azygos vein-arches over roof of R. lung
heart impression
L. Lung Medial
aortic arch thoracic aorta esophagus in midline heart impression lingula
Visceral Pleura
inner lining on lung, smooth slippery surface to freely move on the parietal pleura
Parietal Pleura
outer layer, adjacent to thoracic wall cervical part costal part diaphragmatic part mediastinal
Lung Recesses
site of fluid accumulation
costodiaphragmatic
costomediastinal
Lung Root
pulmonary arteries pulmonary veins bronchi hilum pleura covering
hilum
passageway of doorway
includes: pulmonary artery, pulmonary vein, primary bronchus
Pulmonary Ligament
extension of pleura covering, allows for expansion and keeps everything together
Right Lung Root
pulmonary artery are anterior to primary bronchu
Left Lung Root
pulmonary artery are superior
Trachea
rings
carina– internal feature, at point of main bifurcation
bronchi
right primary (larger) –more vertical
left primary
secondary bronchi– each will serve a respective lobe
tertiary
bronchopulmonary segments, 10 different segments
Reflections
costodiaphragmatic
costomediastinal
costovertebral
Right Atrium
crista terminalis
septum (fossa ovalis)
opening of AV valve, coronary sinus, inferior vena cava, superior vena cava
pectinate muscle
Fossa ovalis
remnant of fetal foramen ovale that connected right and left atria
Left Atrium
valve of foramen ovale
opening of the AV valve
4 pulmonary veins
Right Ventricle
right AV valve (tricuspid)– three cusps, chordae tendineae, and 3 papillary muscles
conus arteriosus
opening of AV and pulmonary trunk
pulmonary valve
wall– trabeculae carneae and septomarginal trabecula (moderator band)
Left Ventricle
aortic valve opening of aortic valve and AV valve left AV valve (bicuspid)-- two cusps, chordae tendinease, 2 papillary muscles interventricular septum wall-trabeculae carneae
Ligamentum Arteriosum
Ductus Arteriosus fetal remnant–
pulmonary trunk to arch of aorta
Chordae Tendinae
oriented to papillary muscles, prevents reflux of blood into atria
Ascultation Sites
Aortic
pulmonary
R AV tricupsid
L AV, mitral
