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17 sie 2023 · The right atrium and ventricle make up most of the sternocostal surface of the heart, while the diaphragmatic surface is made up by the right and left ventricles. The left atrium contributes to the anatomical base.
- Breast
History. The patient was a 46-year-old premenopausal woman...
- Anterior Cardiac Veins
Anatomy and course. The 3-5 anterior cardiac veins emerge on...
- Crista Terminalis
The crista terminalis (terminal crest) is a C-shaped ridge...
- Lung Disease
Some patients with pre-existing conditions such as bronchial...
- Layers of the Heart
This article will discuss the layers of the heart (the...
- Coronary Arteries
Coronary arteries and cardiac veins. The heart is a...
- Ductus Arteriosus
Ligamentum arteriosum (also known as Ligament of Botallo or...
- Pulmonary Valves
The pulmonary valve is found at the pulmonary orifice just...
- Breast
22 sty 2018 · The left atrium is one of the four chambers of the heart, located on the left posterior side. Its primary roles are to act as a holding chamber for blood returning from the lungs and to act...
The left atrium receives the oxygenated blood from the left and right pulmonary veins, which it pumps to the left ventricle (through the mitral valve (left atrioventricular valve) for pumping out through the aorta for systemic circulation.
2 mar 2024 · The left atrium is located in the upper part of the heart, posterior to the right atrium and above the left ventricle. It occupies a central position in the thoracic cavity, lying slightly to the left of the midline.
The left atrium is approximately cube shaped and forms the base of the heart posteriorly. It has thicker muscular walls compared to the right atrium; however, the ventricular walls are significantly thicker. The inner surface contains pectinate muscles, but unlike the right atrium, it does not contain the crista terminalis.
19 kwi 2023 · Left Atrium. The left atrium receives oxygenated blood from the four pulmonary veins, and pumps it through the left atrioventricular orifice (guarded by the mitral valve) into the left ventricle. In the anatomical position, the left atrium forms the posterior border (base) of the heart.
The left atrium is one of the four chambers of the heart. Compared to the right atrium, it is smaller in volume and thickness; however its axis is arranged transversely as to cover part of the right atrium. Oxygen-rich blood from the lungs enters the left atrium through the pulmonary vein.
