Right atrium Flashcards
What is the right atrium divided into?
two continuous spaces
What separates the two continuous spaces of the right atrium externally?
sulcus termanalis cordis
extends from right side of the opening of SVC to IVC
What separates the two continuous spaces of the right atrium internally?
crista termanalis
smooth ridge begins at the opening of SVC extends down lateral wall to lip of IVC
What is the sinus vena cavae
IVC & SVC empties into this space
smooth wall posterior to the crista termanlis
derived from right horn sinus venosus
What are the pectinate muscles?
covers wall of the right auricle and the wall anterior to the crista terminalis
Wat are the valves associated with the right atrium?
valve of coronary sinus and IVC
coronary sinus is more medial than IVC
What did the valve of the IVC help the do?
direct oxygenated blood to the foramen ovale
what separates the right atrium and left atrium?
intraatrial septum
What is the fossa ovalis?
marks the location of the foramen ovale in fetal circulation
hat is the limbus fossa ovalis?
superior prominent border of the fossa ovalis
What are the small openings all over the right atrial wall?
openings for the foramina of the venue cordis minmae
What border does the right atria form?
right border of the heart
