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14 Cards in this Set
- Front
- Back
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Gen rt atrium
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-rt border of ht
-recieves veinous blood from SVC, IVC, and Coronary Sinuses -larger than L. atrium but has a thinner wall and has a right atrial pressure slightly lower than L. atrial pressure -post part-smooth thin walled (Sinus Venarum) -Ant part- rough of pectinate muscles -rt-AV orifice |
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sulcus terminalis
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a shallow, vertical groove that externally separates the smooth and rough parts of the atrial wall
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crista terminalis
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this is the internal separator of the smooth and rough parts of the atrial wall
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sinus venarum
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smooth, thin-walled posterior part on which the SVC and IVC and coronary sinus openthis brings in poorly oxygenated blood into heart
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musculi pectinati
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prominent ridges of atrial myocardium located on the inner surface of much of the right atrium and both auricles
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right auricle
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earlike structureconical muscular pouch projecting from right atrium; is like an add-on room which can increase the capacity of the atrium as it overlaps the ascending aorta
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interatial septum
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Separates the right and left atria; has an oval, thumbprint-sized depression (fossa ovalis)
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fossa ovalis
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this is whats in the interatrial septum (see definition above); its a remnant of the oval foramen and its valve in the fetus
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limbus fossa ovalis
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border of the oval fossa (surrounding the fossa)
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ostium of the coronary sinus
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a short venous trunk which receives most of cardiac veins; between the right AV orifice and IVC orifice
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valve of the coronary sinus
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a one-cusp valve at right margin of its opening
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valve of inferior vena cava
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rudimentary, semi-lunar crescent of tiSSue; has no function after birth, varies a lot in size, and is sometimes absent
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right atrioventricular ostium
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(Right AV orifice)the vessel in which the right atrium discharges poorly oxygenated blood it has received into the right ventricle
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tricuspic valve
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-tricuspid with anterior, posterior, and septal cusps
-attached by chordae tendineae to 3 papillary muscles which keep the valves against the pressure developed hearts pumping action -lies between right atrium and ventricle, behind right half of sternum opposite the 4th intercostal space -its covered by endocardium - the valve is closed during ventricular systole (contraction); closure contributes to first heart sound... the lub one |
