Opening of coronary sinus
Ostium sinus coronarii
Definition
The coronary sinus opens into the atrium, between the orifice of the inferior vena cava and the atrioventricular opening. The opening of coronary sinus returns blood from the substance of the heart and is protected by a semicircular valve, the valve of the coronary sinus (valve of Thebesius).
References
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
