Left margin of heart
Information about Left margin of heart
| Left margin of heart | |
|---|---|
| Sternocostal surface of heart. | |
| Heart seen from above. | |
| subject #138 528 | |
| Dorlands/Elsevier | m_04/12513824 |
It extends from a point in the second left intercostal space, about 2.5 mm. from the sternal margin, obliquely downward, with a convexity to the left, to the apex of the heart.
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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. heart is a muscular organ responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in the annelids, mollusks, and arthropods.
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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The right margin of the heart (right border of heart) is long, and is formed by the right atrium above and the right ventricle below.
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- The atrial portion
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The left ventricle is one of four chambers (two atria and two ventricles) in the human heart. It receives oxygenated blood from the left atrium via the mitral valve, and pumps it into the aorta via the aortic valve.
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The left atrium is one of the four chambers in the human heart. It receives oxygenated blood from the pulmonary veins, and pumps it into the left ventricle.
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Structure
Blood is pumped through the left atrioventricular orifice, which contains the mitral valve...... Click the link for more information.
The intercostal space is the space between two ribs (Lat. costa). Since there are 12 ribs on each side, there are 11 intercostal spaces.
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Importance of intercostal space
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The apex of the heart is the lowest superficial part of the heart.
It is directed downward, forward, and to the left, and is overlapped by the left lung and pleura.
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It is directed downward, forward, and to the left, and is overlapped by the left lung and pleura.
External anatomy
It lies behind the fifth left intercostal space, 8 to 9 cm...... Click the link for more information.
Loyola University Chicago is a private co-educational religious-affiliated university established in Chicago in 1870 as Saint Ignatius College. It was founded by the Roman Catholic religious order of the Society of Jesus and bears the name of the Jesuit patron, Saint Ignatius of
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Public domain comprises the body of knowledge and innovation (especially creative works such as writing, art, music, and inventions) in relation to which no person or other legal entity can establish or maintain proprietary interests within a particular legal jurisdiction.
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Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened) is an English-language human anatomy textbook widely regarded as a classic work on the subject.
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Human anatomy is primarily the scientific study of the morphology of the adult human body.[1] It is subdivided into gross anatomy and microscopic anatomy.[1]
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Torso is an anatomical term for the central part of the many animal bodies (including that of the human) from which extend the neck and limbs. It is sometimes referred to as the trunk. The torso includes the thorax and abdomen.
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Circulatory System is a psychedelic rock musical ensemble formed by musician/painter Will Cullen Hart, and featuring Hannah Jones, Derek Almstead, Peter Erchick, John Fernandes, and Heather McIntosh.
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heart is a muscular organ responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in the annelids, mollusks, and arthropods.
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In anatomy, the atrium (plural: atria) refers to a chamber or space. As such it may for example be the atrium of the lateral ventricle in the brain or, popularly, the blood collection chamber of a heart.
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The interatrial septum is the wall of tissue that separates the right and left atria of the heart.
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Development
The interatrial septum forms during the first and second months of fetal development. Formation of the septum occurs in several stages...... Click the link for more information.
musculi pectinati (pectinate muscles).
In the left atrium, the musculi pectinati, fewer and smaller than in the right auricula, are confined to the inner surface of the auricula. This is due to the embryological origin of the auricles, which are the true atria.
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In the left atrium, the musculi pectinati, fewer and smaller than in the right auricula, are confined to the inner surface of the auricula. This is due to the embryological origin of the auricles, which are the true atria.
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In the heart, a ventricle is a heart chamber which collects blood from an atrium (another heart chamber that is smaller than a ventricle) and pumps it out of the heart.
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Interventricular septum (or ventricular septum, or during development septum inferius) is the stout wall separating the lower chambers (the ventricles) of the heart from one another.
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The trabeculae carneae (columnae carneae, or fleshy beams), are rounded or irregular muscular columns which project from the whole of the inner surface of the ventricle, with the exception of the conus arteriosus.
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The chordae tendineae, or heart strings, are cord-like tendons that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart.
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In anatomy, the papillary muscles of the heart serve to limit the movements of the mitral and tricuspid valves. These muscles contract to tighten the chordae tendineae, which in turn prevent inversion. This occurs in response to pressure gradients.
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In anatomy, the heart valves are valves in the heart that maintain the unidirectional flow of blood by opening and closing depending on the difference in pressure on each side. The mechanical equivalent of the heart valves would be the reed valves.
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The cusps of the heart valves serve to seal the heart valves when closed. There are normally three cusps for each valve except the mitral valve (hence its alternate name, "bicuspid valve".)
"Nodules" are located at the tip of the valve, to form a tighter seal.
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"Nodules" are located at the tip of the valve, to form a tighter seal.
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The base of the heart, directed upward, backward, and to the right, is separated from the fifth, sixth, seventh, and eighth thoracic vertebræ by the esophagus, aorta, and thoracic duct.
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The apex of the heart is the lowest superficial part of the heart.
It is directed downward, forward, and to the left, and is overlapped by the left lung and pleura.
..... Click the link for more information.
It is directed downward, forward, and to the left, and is overlapped by the left lung and pleura.
External anatomy
It lies behind the fifth left intercostal space, 8 to 9 cm...... Click the link for more information.
The atria of the heart are separated from the ventricles by the coronary sulcus (coronary groove, auriculoventricular groove, atrioventricular groove); this contains the trunks of the nutrient vessels of the heart, and is deficient in front, where it is
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The interatrial groove, separating the two atria, is scarcely marked on the posterior surface, while anteriorly it is hidden by the pulmonary artery and aorta.
This article was originally based on an entry from a public domain edition of Gray's Anatomy.
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This article was originally based on an entry from a public domain edition of Gray's Anatomy.
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anterior longitudinal sulcus (or anterior interventricular sulcus), is situated on the sternocostal surface of the heart, close to its left margin. The other groove separating the ventricles is the posterior interventricular sulcus.
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posterior longitudinal sulcus (posterior interventricular sulcus, inferior interventricular groove), on the diaphragmatic surface near the right margin.
In it run the posterior interventricular artery and middle cardiac vein.
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In it run the posterior interventricular artery and middle cardiac vein.
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