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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. Inferior (or diaphragmatic) – Left and right ventricles. Right pulmonary – Right atrium. Left pulmonary – Left ventricle.
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- 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!)
Nov 10, 2024 · Diaphragmatic (Inferior) Surface: This surface is formed by both ventricles, primarily the left ventricle, and is in contact with the diaphragm. Pulmonary (Left) Surface: This surface is mainly composed of the left ventricle and is in contact with the left lung. Borders of the Heart: Right Border: Formed by the right atrium.
Jan 11, 2021 · The diaphragmatic surface is horizontally orientated. 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.
- Diaphragmatic Surfaces
- Sternocostal Surface
- Pulmonary Surfaces
In its anatomical position, the heart rests on its diaphragmatic or inferior surface. This surface faces inferiorly and lies on the central tendon of the diaphragmand left muscular hemidiaphragm. It is formed mainly by the left ventricle and a small part of the right ventricle, and both are separated by the posterior interventricular sulcus. The co...
The sternocostal or anterior surfacefaces forward, upward and slightly to the left. It is formed mainly by the right ventricle and right atrium, and this surface also has a minimal contribution from the left atrium and left ventricle.
The two pulmonary or lateral surfaces are broad and convex, and they both face the lungs. 1. Theleft pulmonary surfaceis formed mainly by the lateral part of the left ventricle. 2. The right pulmonary surfaceconsists mainly of the lateral portion of the right atrium.
Jul 13, 2023 · The diaphragmatic surface is the inferior surface of the heart and is made up mostly by the left ventricle. The anatomical apex of the heart is the pinnacle of the pyramid; normally found in the left fifth intercostal space, in the midclavicular line of the recumbent patient.
The diaphragmatic surface (inferior surface), directed downward and slightly backward, is formed by the ventricles, and rests upon the central tendon and a small part of the left muscular portion of the diaphragm.
