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Apr 20, 2023 · In the anatomical position, the heart has five surfaces – each formed by the different chambers of the heart: Anterior (or sternocostal) – Right ventricle. Posterior (base of the pyramid) – Left atrium.
- Heart
The Surfaces and Borders of the Heart.
- Heart
Aug 3, 2023 · Borders of the heart. The heart is placed within the middle mediastinum. Laterally and posteriorly it is surrounded by the lungs, while the sternum is located anteriorly. The superior border, or base of the heart, is the portion located opposite the apex
- Medical Content
- 10 min
- 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!)
The heart has four borders separating the surfaces: Superior border - formed by the right and left atrium, auricles, and the great vessels; Right border - formed by the right atrium extending between the superior and inferior vena cava ;
Jan 11, 2021 · The sharp angle formed mainly by the right ventricle and occupying the lower heart border is the acute margin of the heart. The rounded obtuse margin of the heart is formed mainly by the left ventricle to the left of the sternocostal surface.
The four borders are the superior, inferior, right, and left borders. As the heart is rotated, the majority of the anterior surface consists of the right atrium and ventricle. The superior border consists of the atria, the base of the superior vena cava, ascending aorta, and pulmonary trunk.
The Surfaces and Borders of the Heart.
