The left atrioventricular opening (mitral orifice) is placed below and to the left of the aortic orifice. It is a little smaller than the corresponding aperture of the opposite side. […]
List of articles in "Anatomical Structure" category - Page 191
Valve of inferior vena cava
The valve of the inferior vena cava (Eustachian valve) lies at the junction of the inferior vena cava and right atrium. In fetal life the Eustachian valve helps direct the […]
Crista terminalis
The Crista Terminalis represents the junction between the sinus venosus and the heart in the developing embryo. In the development of the human heart the right horn and transverse portion […]
Spina vestibuli
Below the opening of the orifice of the coronary sinus they fuse to form a triangular thickening—the spina vestibuli.
Posterior interventricular sulcus
The ventricles of the heart are separated by two grooves one of which the anterior longitudinal sulcus is situated on the sternocostal surface of the heart close to its left […]
Septum spurium
During development of the heart the orifice of the coronary sinus lies obliquely and is guarded by two halves the right and left venous valves; above the opening these unite […]
Primary interatrial foramen
In the developing heart the atria initially communicate with each other by an opening between the free edge of the septum primum and the AV cushions known as the primary […]
Foramen secundum
The ostium secundum (or foramen secundum) is a foramen in the septum primum.It should not be confused with the foramen ovale which is a foramen in the septum secundum.
Anterior nares
The anterior nares are the external (or proper) portion of the nostrils (nose). The anterior nares opens into the nasal cavity and allow the inhalation and exhalation of air. Each […]
Cardiac muscle cell
Cardiac muscle cells or cardiomyocytes (also known as myocardiocytes or cardiac myocytes) are the muscle cells (myocytes) that make up the cardiac muscle. Each myocardial cell contains myofibrils which are […]