Slika je v javni domeni, saj je zgolj mehanska preslikava ali fotokopija izvirnika, ki je v javni domeni, ali pa je - po dostopnih informacijah - preveč podobna taki preslikavi ali fotokopiji, da bi bila lahko zaščitena z avtorskimi pravicami. Izvirnik sam je v javni domeni iz naslednjega razloga:
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To delo je v javni domeni tudi v državah in na območjih, kjer trajajo avtorske pravice za časa avtorjevega življenja in še 100 let ali manj po tem.
Delo je v Združenih državah Amerike v javni domeni, saj je bilo objavljeno (ali registrirano pri Uradu za avtorske pravice ZDA) pred 1. januarjem 1929.
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
Oznaka je prirejena za uporabo v primerih, ko je treba izjaviti, da je vsaka izboljšava (npr. poprava osvetlitve, kontrasta, barv, ostrine) sama po sebi nezadostna, da bi tvorila nove avtorske pravice. Uporabi se lahko povsod, kjer ni znano, ali so bile napravljene izboljšave, kot tudi takrat, ko so izboljšave jasne, vendar ne zadostujejo za novo avtorsko delo. Za znane neobdelane preslikave lahko uporabite oznako {{PD-old}}. Uporaba predloge {{PD-scan}} je opisana na strani Commons:When to use the PD-scan tag.
Opomba: oznaka se uporablja samo pri preslikavah in fotokopijah. Pri fotografijah izvirnikov v javni domeni od daleč se morda lahko uporabi oznaka {{PD-Art}}. Več o njej je razloženo na strani Commons:When to use the PD-Art tag.
The coronary sinus is a collection of veins joined together to form a large vessel that collects blood from the myocardium of the heart. It is present in humans and other animals. It delivers deoxygenated blood to the Right atrium in conjunction with the superior and inferior vena cava.
The coronary sinus opens into the right atrium, between the inferior vena cava and the atrio-ventricular orifice. It returns the blood from the substance of the heart, and is protected by a semicircular fold of the lining membrane of the auricle, the coronary valve (the valve of Thebesius). The sinus, before entering the auricle, is considerably dilated - nearly to the size of the end of the little finger. Its wall is partly muscular, and at its junction with the great coronary vein is somewhat constricted and furnished with a valve consisting of two unequal segments.(Gray 462)
Location: It is located in the right atrium and runs transversely in the groove between the left atrium and ventricle on the posterior surface of the heart.
The coronary sinus orifice (opening) is just superior to the septal leaflet of the tricuspid valve. The coronary sinus orifice is also known as the ostium of the coronary sinus, and is guarded by the Thebesian valve.
Drainage: It receives blood mainly from the small, middle, great and oblique cardiac veins. It also receives blood from the left marginal vein and the left posterior ventricular vein. The anterior cardiac veins drain directly into the right atrium. (Some small veins drain into any of the four chambers of the heart.)
It drains into the right atrium on the posterior, inferior surface, medial to the inferior vena cava opening.
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