Differences
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| en:right_atrium [2024/08/30 11:29] – created brahmantra | en:right_atrium [] () – - () 127.0.0.1 | ||
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| - | ====== RIGHT ATRIUM ====== | ||
| - | * right atrium | ||
| - | * External features | ||
| - | * little ear or right auricle | ||
| - | * covers the root of ascending aorta | ||
| - | * partly overlaps the infundibulum of right ventricle | ||
| - | * margins are notched and interior is sponge like | ||
| - | * right border of atrium | ||
| - | * along this border | ||
| - | * shallow vertical groove | ||
| - | * passes from SVC to IVC | ||
| - | * sulcus terminalis ( corner sulcus ) | ||
| - | * upper part contains SA node | ||
| - | * Caused by | ||
| - | * internal muscular ridge | ||
| - | * crista terminalis ( corner line ) | ||
| - | * right atrioventricular groove | ||
| - | * separates | ||
| - | * right atrium from the right ventricle | ||
| - | * more or less vertical | ||
| - | * lodges right coronary artery | ||
| - | * small cardiac vein | ||
| - | * Internal features | ||
| - | * smooth posterior part or sinus venarum | ||
| - | * most of tributaries except anterior cardiac vein drain in to it | ||
| - | * superior venacava opens at upper end | ||
| - | * inferior venacava opens at lower end | ||
| - | * guarded by rudimentary valve | ||
| - | * eustachian valve (gate ) | ||
| - | * in embryonic life | ||
| - | * directs IVC blood to left atrium | ||
| - | * coronary sinus ( heart tank ) | ||
| - | * opens between | ||
| - | * IVC opening and Right atrioventricular orifice | ||
| - | * guarded by thebesian valve | ||
| - | * venae cordis minimae ( small heart veins) | ||
| - | * present in walls of all 4 chambers | ||
| - | * open in to right atrium | ||
| - | * derived from right horn of sinus venosus | ||
| - | * intervenous tubercle of lower | ||
| - | * posterior wall of atrium | ||
| - | * rough anterior part or pectinate part | ||
| - | * derived from primitive artrial chamber | ||
| - | * series of transverse muscular ridges | ||
| - | * called musculi pectinati | ||
| - | * interatrial septum | ||
| - | * derived from septum primum and septum secundum | ||
| - | * fossa ovalis | ||
| - | * annulus ovalis or limbus fossa ovalis | ||
| - | {{: | ||