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  1. Mar 3, 2018 · This document provides an overview of the anatomy, physiology, and conduction system of the heart. It describes the four chambers of the heart, including the atria and ventricles. It discusses the layers of the heart, including the epicardium, myocardium, and endocardium.

  2. Jul 17, 2017 · The document provides an overview of heart anatomy and physiology. It describes the four chambers of the heart, including the atria and ventricles, separated by septa. Blood flows through the heart in two circuits - pulmonary circulation from the heart to the lungs and systemic circulation from the heart to the body.

  3. Drawings of the surface anatomy of the normal heart, anterior and posterior, with English labels. From the OpenStax Anatomy and Physiology book.

  4. Sep 19, 2018 · The human heart is a muscular organ that provides continuous blood circulation through the cardiac cycle. It is located in the middle of the chest behind the sternum. The heart is divided into four chambers - two upper atria and two lower ventricles.

    • Heart anatomy. The heart has five surfaces: base (posterior), diaphragmatic (inferior), sternocostal (anterior), and left and right pulmonary surfaces. It also has several margins: right, left, superior, and inferior
    • Heart valves. Heart valves separate atria from ventricles, and ventricles from great vessels. The valves incorporate two or three leaflets (cusps) around the atrioventricular orifices and the roots of great vessels.
    • Blood flow through the heart. The blood flow through the heart is quite logical. It happens with the heart cycle, which consists of the periodical contraction and relaxation of the atrial and ventricular myocardium (heart muscle tissue).
    • Coronary circulation. The heart must also be supplied with oxygenated blood. This is done by the two coronary arteries: left and right. Heart muscles work constantly (thank goodness!)
  5. Nov 10, 2024 · The heart is a four-chambered muscular organ with a complex structure that allows it to efficiently pump blood throughout the body. It is divided into two halves—the right and left sides—each responsible for different aspects of circulation. The heart consists of four chambers: the right atrium, right ventricle, left atrium, and left ventricle.

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  7. The heart is located in the thoracic cavity medial to the lungs and posterior to the sternum. On its superior end, the base of the heart is attached to the aorta, pulmonary arteries and veins, and the vena cava. The inferior tip of the heart, known as the apex, rests just superior to the diaphragm.

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