Diaphragmatic surface
Encyclopedia
The diaphragmatic surface of the heart
, directed downward and slightly backward, is formed by the ventricles
, and rests upon the central tendon
and a small part of the left muscular portion of the diaphragm
.
It is separated from the base by the posterior part of the coronary sulcus
, and is traversed obliquely by the posterior longitudinal sulcus
.
Shape is slightly concave. Direction is downwards and slightly backwards. It is formed 2/3 by the right ventricle and 1/3 by the left ventricle. It is grooved by the posterior interventricular sulcus which divides it into 2 ventricles. Vessels related to it are posterior interventricular branch of right coronary artery and middle cardiac vein. It lies on the central tendon of the diaphragm and is separated from fundus of the stomach and left lobe of liver.
Heart
The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...
, directed downward and slightly backward, is formed by the ventricles
Ventricle (heart)
In the heart, a ventricle is one of two large chambers that collect and expel blood received from an atrium towards the peripheral beds within the body and lungs. The Atria primes the Pump...
, and rests upon the central tendon
Central tendon
The central tendon of the diaphragm is a thin but strong aponeurosis situated slightly anterior to the vault formed by the muscle, resulting in longer posterior muscle fibers....
and a small part of the left muscular portion of the diaphragm
Thoracic diaphragm
In the anatomy of mammals, the thoracic diaphragm, or simply the diaphragm , is a sheet of internal skeletal muscle that extends across the bottom of the rib cage. The diaphragm separates the thoracic cavity from the abdominal cavity and performs an important function in respiration...
.
It is separated from the base by the posterior part of the coronary sulcus
Coronary sulcus
The atria of the heart are separated from the ventricles by the coronary sulcus ; this contains the trunks of the nutrient vessels of the heart, and is deficient in front, where it is crossed by the root of the pulmonary artery.-External links:*...
, and is traversed obliquely by the posterior longitudinal sulcus
Posterior longitudinal sulcus
The ventricles 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 margin...
.
External links
Shape is slightly concave. Direction is downwards and slightly backwards. It is formed 2/3 by the right ventricle and 1/3 by the left ventricle. It is grooved by the posterior interventricular sulcus which divides it into 2 ventricles. Vessels related to it are posterior interventricular branch of right coronary artery and middle cardiac vein. It lies on the central tendon of the diaphragm and is separated from fundus of the stomach and left lobe of liver.