Mitral valve

Anatomy of the mitral valve The mitral valve or bicuspid valve is one of the four valves of the heart and is located between the left ventricle and the left atrium. The name mitral valve derives from its appearance. It resembles a bishop’s mitre and was therefore named after it. It belongs to the sail … Read more

Sinus node | Function of the heart

Sinus node The sinus node, rarely also called Keith-Flack node, consists of specialized heart muscle cells and is responsible for the contraction of the heart by transmitting electrical potentials, and is thus the clock of the heartbeat. The sinus node is located in the right atrium just below the orifice of the right vena cava. … Read more

Function of the heart

Synonyms Heart sounds, heart signs, heart rate, medical: Cor Introduction The heart ensures the blood circulation of the whole body through constant contraction and relaxation, so that all Oragne is supplied with oxygen and nutrients and decomposition products are removed. The pumping action of the heart takes place in several phases. Heart action In order … Read more

The Foramen ovale of the heart

Definition – What is the Foramen ovale? The heart consists of two atria and two chambers, which are normally separated from each other. However, the Foramen ovale represents an opening, which causes blood to pass from the right atrium to the left atrium in the fetus. Normally, blood would pass from the right atrium into … Read more

Left ventricle

Synonym: Ventriculus sinister, left ventricle Definition The left ventricle, as part of the “great” or body’s circulation, is located downstream of the left atrium (atrium sinistrum) and pumps the oxygen-rich blood fresh from the lungs into the aorta and thus into the body’s circulation, where it supplies all the important structures with oxygen. Anatomy left … Read more

Histology – Wall layering | Left ventricle

Histology – Wall layering The wall layers are the same in all four heart interiors: The innermost layer is the endocardium, consisting of a single-layer epithelium, which is supported by the connective tissue lamina propria. The muscle layer (myocardium) is connected to the outside of this. The outermost layer is the epicardium. Blood supply The … Read more