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 … Function of the heart
Excitation formation and conduction system The work of the heart/function of the heart is triggered and controlled by electrical impulses.This means that the impulses are created somewhere and are passed on. These two functions are performed by the excitation and conduction system. The sinus node (Nodus sinuatrialis) is the origin of the electrical impulses. It … Excitation formation and conduction system | 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. … Sinus node | Function of the heart
Control of the heart action This whole process works automatically – but without a connection to the nervous system of the body, the heart has hardly any possibilities to adapt to the changing requirements (= changing oxygen demand) of the whole organism. This adaptation is mediated via the heart nerves from the central nervous system … Control of the heart action | Function of the heart
Heart Rate Calculation If you want to train in your individual optimal heart rate zone you should be able to calculate your optimal heart rate. The calculation is done according to the so-called Karvonen formula, where the resting heart rate is subtracted from the maximum heart rate, the result is multiplied by 0.6 (or 0.75 … Heart Rate Calculation | Function of the heart
There is a variety of heart diseases, which often have many different causes. Inflammations, injuries and changes in age can change and damage the heart. Classification of heart diseases In the following you will find the most common diseases of the heart divided into: Structural changes of the heart Vascular diseases of the heart Infectious … An overview of the diseases of the heart
Definition The sinus node (also: sinuatrial node, SA node) is the primary electrical pacemaker of the heart and is largely responsible for heart rate and excitation. Function of the sinus node The heart is a muscle that pumps on its own, which means it is not dependent on nerves like most muscles. This is because … Sinus node
Sinus node defect If the sinus node fails as the primary pacemaker and stimulation center of the heart, a secondary pacemaker must step in for it (sick sinus syndrome). This is called the atrioventricular node (AV node) and can take over the function of the sinus node to a certain extent. It generates a rhythm … Sinus node defect | Sinus node
Synonyms Cardia, pericardium, epicardium, myocardium, endocardium Medical: Cor Pericardium Epicardium Myocardium Endocardium. The next and by far the thickest layer is the heart muscle (myocardium). It is the actual motor of the cardiovascular system. The muscles are separated from the blood only by a very thin layer of cells (endocardium), which is very smooth on … Heart
HistologyTissue The endocardium is a flat, unicellular layer that separates the chamber muscles from the blood. It corresponds functionally to the inner lining of the blood vessels (endothelium). Its function, preventing the formation of a blood clot (thrombus), is ensured by its special smooth surface and by the production of anticoagulants (nitrogen monoxide (NO), prostacyclin). … HistologyTissue | Heart
