Cephalic vein Definition It is the subcutaneous vein of the upper extremity. It is sometimes denoted as “antecubital vein”. The term cephalic refers to anatomy of the head. Cephalic vein Location It is located on the lateral side of the left and right arm that runs from the hand to the shoulder. It is not a deep or distal [...]

Left atrial appendage Definition It refers to a muscular sac or pouch joined to the left atrium of the cardiac chambers. It is sometimes also called the ‘left auricle’ although the latter term was originally used to describe the left atrium. It is abbreviated as LAA.

What is Fibrous pericardium? It is a fibrous sac that acts as the outermost layer of the pericardium, a thin sac-like membrane that envelops the heart.

What is Conus arteriosus? It is a cone-shaped pouch that is formed from the left angle and the upper angle of the right ventricle located in the chordate heart. The pulmonary trunk originates from this structure. The sac has a smooth wall.

Atrioventricular septum Definition It is cardiac septum (division between two cavities or tissues) between the left ventricle (LV) and the right atrium (RA) of the heart. It is abbreviated as AV septum. Atrioventricular septum Anatomy The AV septum comprises of a muscular as well as a membranous section. It is a small section of the [...]

What is Serous pericardium? It is one of the layers of the Pericardium, one of the sac-like membranes that circumvent the heart. It is a single flar cell layer that lies on a subserosal connective tissue layer. It is also called Serous portion of pericardium. In Latin, this structure is known as Pericardium serosum. It [...]

Coronary sulcus Definition It refers to a groove or furrow on the outer cardiac surface that marks the point of division between the ventricles and the atria. Coronary sulcus Synonyms This cardiac furrow is known by various other names, like: Coronary Groove Auriculoventricular Groove Atrioventricular Groove AV Groove Coronary sulcus Location It is located between [...]

Pericardial sinus Definition It refers to the wall at the back of the pericardial sac. It is ventrally bound by a pericardial membrane within which lies the heart. Pericardial sinus Types There are two types of this structure: Oblique – It is the small concavity in the pericardial cavity which is situated behind the base [...]

Papillary muscle Definition It refers to a tiny muscle inside the heart that serves as an anchor for the cardiac valves. There are two muscles of this type, which are named according to their position in the heart – Anterior Papillary muscle Posterior Papillary muscle Papillary muscle Location As aforesaid, these muscles can be found [...]

Anterior interventricular sulcus Definition It refers to a groove or furrow on the anteriosuperior cardiac surface, which designates the position of the septum between the right and left ventricles. It is one of the two grooves demarcating the two ventricles of the heart, the other being the posterior interventricular sulcus. Anterior interventricular sulcus Synonyms This [...]