- Heart | Structure, Function, Diagram, Anatomy, Facts | Britannica
This process is called the cardiac cycle The period of relaxation is called diastole The period of contraction is called systole Diastole is the longer of the two phases so that the heart can rest between contractions In general, the rate of heartbeat varies inversely with the size of the animal
- Heart - Wikipedia
Cardiac muscle tissue has autorhythmicity, the unique ability to initiate a cardiac action potential at a fixed rate—spreading the impulse rapidly from cell to cell to trigger the contraction of the entire heart
- Cardiovascular system: Function, organs, conditions, and more
What is the cardiac cycle? The cardiac cycle consists of two phases: diastole and systole The first phase is diastole, in which the ventricles fill with blood It begins when the aortic or
- About Heart Disease | Heart Disease | CDC
High blood pressure, high blood cholesterol, and smoking are key risk factors 1 out of every 5 deaths in the United States are due to heart disease What is heart disease? The term "heart disease" refers to several types of heart conditions The most common type of heart disease in the United States is coronary artery disease (CAD)
- Heart Anatomy, Function, and Blood Circulation - WebMD
As the heart beats, it pumps blood through a system of blood vessels called the circulatory system The vessels are elastic tubes that carry blood to every part of the body Blood is essential
- Heart Pictures, Diagram Anatomy | Body Maps - Healthline
The heart is a mostly hollow, muscular organ composed of cardiac muscles and connective tissue that acts as a pump to distribute blood throughout the body’s tissues
- Heart Anatomy: Overview, Cardiac Chambers, Great Vessels and Septi
Intraoperatively, the anatomy of the heart is viewed from the right side of the supine patient via a median sternotomy incision The structures initially seen from this perspective include the superior vena cava, right atrium, right ventricle, pulmonary artery, and aorta
- American Heart Association | To be a relentless force for a world of . . .
Learn more about the American Heart Association's efforts to reduce death caused by heart disease and stroke
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