Changes

====Right Atrium====

====Right Atrium====

The right atrium forms the dorsocranial section of the base of the heart and receives blood from the cranial vena cava, caudal vena cava and coronary sinus. The interatrial septum is a thin partition dividing the right and left atria and possesses a characteristic oval depression called the '''fossa ovalis''' which is a remnant of the foetal '''foramen ovalis'''. The right atrium also houses the sinoatrial node. Blood flows from the right atrium to the right ventricle through the '''tricuspid valve''' (also know as the right atrioventricular valve).

The right atrium forms the dorsocranial section of the base of the heart and receives blood from the cranial vena cava, caudal vena cava and coronary sinus. The interatrial septum is a thin partition dividing the right and left atria and possesses a characteristic oval depression called the '''fossa ovalis''' which is a remnant of the foetal [[Foetal Circulation - Anatomy & Physiology|foramen ovalis]]foramen ovalis. The right atrium also houses the sinoatrial node. Blood flows from the right atrium to the right ventricle through the '''tricuspid valve''' (also know as the right atrioventricular valve).

====Right Ventricle====

====Right Ventricle====