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Left atrium
ck12.org
- The left atrium is located posteriorly, forming much of the base of the heart. It receives oxygenated blood from the lungs through the four pulmonary veins (two from each lung).
anatomy.co.uk/heart/
Jan 11, 2021 · The aortic valve lies posterior and to the right, above the nearly vertically orientated tricuspid valve (Figure 3B). The mitral valve is further posterior, overlapped by the more anterior but inferior tricuspid valve. The aortic valve therefore occupies a central position in the heart, wedged between the two atrioventricular valves.
Aug 26, 2013 · The posterior surface has a broad, flat base about 9 cm (3.5 inches) wide. Its directed toward the right shoulder and its apex points inferiorly toward the left hip. If you press your fingers between the fifth and sixth ribs you can feel the apical impulse that’s caused by your beating heart’s apex where it touches the chest wall.
Oct 20, 2024 · The shape of the heart is similar to a pinecone, rather broad at the superior surface (the base, on the posterior side) and tapering to the apex (Figure 17.2.1 17.2. 1). The apex of the heart is inferior and to the left while the base of the heart is superior and posterior.
Apr 20, 2023 · 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. Borders. Separating the surfaces of the heart are its borders. There are four main borders of the heart: Right border – Right atrium.
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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.
Sep 14, 2021 · The inferior tip of the heart, the apex, lies just to the left of the sternum between the junction of the fourth and fifth ribs near their articulation with the costal cartilages. The right side of the heart is deflected anteriorly, and the left side is deflected posteriorly.
Nov 3, 2023 · The heart is shaped as a quadrangular pyramid, and orientated as if the pyramid has fallen onto one of its sides so that its base faces the posterior thoracic wall, and its apex is pointed toward the anterior thoracic wall.
