Flashcards in HEART Deck (39)
what is the location of the heart?
in the mediastinum
slightly to the left
sits on top of diaphragm
what are the borders of the anterior mediastinum?
anterior = sternum
posterior = middle mediastinum
what are the contents of the anterior mediastinum?
internal thoracic vessels
what are the contents of the of the middle mediastinum?
pericardium and heart
SVC / IVC
trachea and main bronchi
phrenic, vagus and left recurrent laryngeal nerves
what are the borders of the superior mediastinum?
interior edge of T4 body
what are the borders of the posterior mediastinum?
anterior = middle mediastinum
posterior = anterior thoracic vertebral column
what are the contents of the posterior mediastinum?
azygous and hemizygous
what are the different divisions of the mediastinum?
what are the different layers of tissue in the heart?
what is the epicardium of the heart?
the innermost layer
made of epithelial cell layer
lines the heart chambers and valves
what is the myocardium layer of the heart?
the muscular inner layer
what is the structure of cardiomyocytes?
striated branching cells
what is the role of intercalated discs in cardiomyocytes?
allows for conduction of contraction
what is the epicardium layer of the heart?
it covers the surface of the heart and great vessels
what is the pericardium of the heart?
it is a double layered sac
there is a fibrous pericardium and a serous pericardium
what is the fibrous pericardium?
it is the outer layer of the pericardium
made of tough connective tissue which anchors the heart to the mediastinum
what is the serous pericardium?
made of simple squamous epithelium
has visceral pericardial layer on outer surface of heart
has parietal outer layer that lines the fibrous pericardium - it secretes fluid
what does the right coronary artery supply?
the right atrium and the right ventricle
what does the right marginal artery of the heart supply?
the right ventricle and the apex
what does the left circumflex artery supply?
supplies the left atrium and left ventricle
what does the left anterior descending artery (LAD) supply?
supplies right ventricle, left ventricle and interventricular septum
what does the left marginal artery supply?
the left ventricle
what does the aortic sac develop into?
the aortic arches
what does the truncus arteriosus develop into?
aortic arches and arteries
what does the bulbus cordis develop into?
right ventricle and outflow tracts
what does the primitive ventricle develop into?
what does the primitive atrium develop into?
parts of the right and left atrium
what does the sinus venosus develop into?
superior vena cava and right atrium
what are the different parts of the primitive heart?