The excitation conduction system of the heart consists of glycogen-rich specialized cardiac myocytes. They focus the contraction signals generated by the excitation generation system and transmit them to the muscles of the atria and ventricles in a specific rhythm, creating an orderly sequence of systole (beating phase of the ventricles) and diastole (relaxation phase of … Cardiac Conduction System: Function, Role & Diseases
The heart consists of a right and a left half and is divided into four chambers. The cardiac septum, also called the septum cordis, runs longitudinally between the two halves of the heart. The septum separates the four chambers of the heart into left and right atria, and left and right ventricles. The terms cardiac … Ventricle: Structure, Function & Diseases
Diastole is the relaxation phase of the heart muscle during which blood flows from the atria into the ventricles during the early filling phase when the leaflet valves are open. In the subsequent late filling phase, further blood is actively delivered to the ventricles by contraction of the atria. In the systole that follows, blood … Diastole: Function, Tasks, Role & Diseases
The medical term blood pressure refers to the pressure that the blood exerts on the blood vessels. However, the pressure conditions are by no means identical in all areas of the bloodstream. Where the blood flows towards the heart is the low pressure area. In the arterial part, where the blood is pumped into the … Diastolic Blood Pressure: Function, Tasks, Role & Diseases
Heart murmurs can occur in people of any age and in most cases indicate serious disease of the heart, heart valves or heart vessels. Treatment of heart murmurs depends on the underlying condition, so they can be a symptom of several heart problems. It is imperative that the cause of the heart murmurs be determined … Heart Murmurs: Causes, Treatment & Help
The truncus pulmonalis is a short arterial vessel that forms a common trunk connecting the right ventricle and the right and left pulmonary arteries into which the truncus pulmonalis branches. At the entrance to the artery is the pulmonary valve, which closes during the relaxation phase of the ventricles (diastole) to prevent backflow of blood … Truncus Pulmonalis: Structure, Function & Diseases
The two heart valves that respectively connect the left atrium to the left ventricle and the right atrium to the right ventricle are called leaflet valves for anatomical reasons. The two leaflet valves function according to the recoil principle and, together with the other two heart valves, which are so-called semilunar valves, ensure orderly blood … Sail Valve: Structure, Function & Diseases
The cardiac septum separates the right side of the heart from the left side. A distinction can be made between a ventricular and an atrial septum. What is the cardiac septum? The cardiac septum is also known as the septum or cardiac septum in medical terminology. It separates the atrium and ventricle of the left … Cardiac Septum: Structure, Function & Diseases
Heart rate is the number of heartbeat cycles per minute, and a heartbeat cycle, also called cardiac action, includes the beating phases of systole and diastole. Systole refers to the contraction of the ventricles including blood ejection phase and diastole refers to the resting phase of the ventricles with simultaneous contraction of the atria and … Heart Rate: Function, Tasks, Role & Diseases
The tricuspid valve is one of the four valves of the heart. It forms the valve between the right atrium and right ventricle and prevents blood from flowing back into the right atrium during contraction of the ventricle (systole). During relaxation (diastole), the tricuspid valve is open, allowing blood to flow from the right atrium … Tricuspid Valve: Structure, Function & Diseases
The heart rhythm can be divided into the two main phases systole, with tension phase and ejection phase, and diastole, with the relaxation phase. The tension phase is the beginning part of systole, in which the two leaflet valves are closed passively, by the increase in pressure, and also actively, by muscle tension, and the … Tension Phase: Function, Tasks, Role & Diseases
While the heart is responsible for maintaining blood circulation with its pumping action, four heart valves ensure that blood always flows in the same direction. The two semilunar valves are each located in the initial region of the large arterial outflow vessels of the two ventricles. The pulmonary valve serves as the outlet valve of … Pocket Flap: Structure, Function & Diseases
