Heart - Structure

The heart (Latin cor) is a hollow, muscular organ that pumps blood through the blood vessels by repeated, rhythmic contractions. The term cardiac means "related to the heart", from the Greek kardia (καρδια) for "heart". Heart - The human heart. Heart - Early development. The human embryonic heart (EHR) begins beating at approximately 21 days after conception, or five weeks after the last normal menstrual period (LMP), which is the date normally used to ...

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Heart - The human heart

Heart - As an icon

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Heart - Structure: Encyclopedia II - Sgt. Pepper's Lonely Hearts Club Band - Themes and structure With Sgt. Pepper, The Beatles wanted to create a record that could, in effect, tour for them — an idea they had already explored with the promotional film-clips made over the previous years, intended to promote them in the United States when they were not touring there. McCartney decided that they should create fictitious characters for each band member and record an album that would be a performance by that fictitious band. The idea of disguise or change of identity was one in which the Beatles, naturally enough, had an avid interest — they ...

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Cardiology - Anatomy & physiology

Heart - Structure: Encyclopedia - Tao Te Ching

The Tao Te Ching (Chinese: 道德經, Dào dé jīng), roughly translated as The Book of the Way and its Virtue (see below on translating the title) is an ancient Chinese scripture. Tradition has it that the book was written around 600 BCE by a sage called Laozi (WG: Lao Tzu, "Old Master"), a record-keeper in the Emperor's Court of the Zhou Dynasty. A careful reading of the text, however, suggests that it is a compilation of maxims sharing similar themes. The authenticity of the date of compositio ...

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Tao Te Ching - Translation

Heart - Structure: Encyclopedia - Congenital heart defect

A congenital heart defect is a defect in the structure of the heart and great vessels of the newborn. Most heart defects either obstruct blood flow in the heart or vessels near it or cause blood to flow through the heart in an abnormal pattern. Heart defects are among the most common birth defects, and are the leading cause of birth defect-related deaths. Congenital heart defect - Overview. Congenital heart defects can be broadly categorised into two groups, acyanotic heart defects ('pink' babies) and cyano ...

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Heart - Structure: Encyclopedia - Atrium

Atrium. In Anatomy, atrium refers to a structure of the heart. In Architecture, atrium refers to a large, open space within a building. Other related archivesAnatomy, Architecture, atrium, building, heart

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Heart - Structure: Encyclopedia - Atrium anatomy

In anatomy, the atrium (plural: atria) is the blood collection chamber of a heart. It has a thin-walled structure that allows blood to return to the heart. There is at least one atrium in an animal with a closed circulatory system. In fish, the circulatory system is very simple: a two-chambered heart including one atrium and one ventricle. In vertebrate groups that evolved later, the circulatory system is much more complicated. Their circulatory systems are divided into two types: a three-chambered heart, with two atria ...

Heart - Structure: Encyclopedia - Afrology

Afrology is a scientific study of the organization of the contemporary social structures of Africa. It places in the heart of African social change the notion of identity. Afrology is a way of thinking about the various forms of social, institutional and personal identification. It posits that each individual, though determined by individual mental and psychological structures, reconstructs himself within the framework of specific or general broad collective ident ...

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Afrology - Afrology Think Tank

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Heart - Structure: Encyclopedia - Endocarditis

Endocarditis is an inflammation of the inner layer of the heart, the endocardium. The most common structures involved are the heart valves. Endocarditis can be classified by etiology as either infective or non-infective, depending on whether a foreign micro-organism is causing the problem. Endocarditis - Infective endocarditis. As the valves of the heart do not actually receive any blood supply of their own, which may be surprising given their location, defense mechanisms (such as white ...

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Endocarditis - Infective endocarditis

Endocarditis - Non-infective endocarditis

Heart - Structure: Encyclopedia - Angiogram

Angiography or arteriography is a medical imaging technique in which an X-ray picture is taken to visualize the inner opening of blood filled structures, including arteries, veins and the heart chambers. Its name comes from the Greek words angeion, "vessel", and graphien, "to write or record". The X-ray film or image of the blood vessels is called an angiograph, or more commonly, an angiogram. The Portuguese physician and neurologist Egas Moniz, Nobel Prize winner in 1949, developed in 1927 th ...

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Angiogram - Types of angiographs

Heart - Structure: Encyclopedia - Atrial natriuretic factor

Atrial natriuretic factor (ANF), atrial natriuretic peptide (ANP) or atriopeptin, is a peptide hormone involved in the homeostatic control of body water and sodium. Atrial natriuretic factor - Structure. ANF is a 28 amino acid peptide with a 17 AA ring, and is closely related to BNP (Brain Natriuretic Peptide, but produced largely in the heart) and CNP (C-type Natriuretic Peptide) which all share the same amino acid ring. ANF was discovered in 1981 by a team in Ottawa led by Merc ...

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Heart - Structure: Encyclopedia - Sternum

Sternum or breastbone is a long, flat bone located in the center of the thorax (chest). It connects to the rib bones via cartilage, forming the rib cage with them, and thus helps to protect the lungs and heart from physical trauma. The sternum is usually cut open (a sternotomy) to gain access to the thoracic contents when performing cardiothoracic surgery. Sternum - Overview. The sternum (Figs. 1 to 3) is an elongated, flattened bone, forming the middle portion of the anterior wall of the thor ...

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Sternum - Body

Sternum - Xiphoid Process

Sternum - Surfaces

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Heart - Structure: Encyclopedia - I Ching

The I Ching is the oldest of the Chinese classic texts. It describes an ancient system of cosmology and philosophy which is at the heart of Chinese cultural beliefs. The philosophy centers on the ideas of the dynamic balance of opposites, the evolution of events as a process, and acceptance of the inevitability of change (see Philosophy, below). In Western cultures, the I Ching is regarded by some as simply a system of divination; others believe it expresses the wisdom and philosophy of ancien ...

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I Ching - Binary sequence

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Heart - Structure: Encyclopedia II - Cardiology - Anatomy & physiology

Cardiology - Basic anatomy Structure of the heart. Epicardium Pericardium Myocardium Papillary muscle Endocardium Coronary circulation (Blood supply of the heart) Heart valves Cardiology - Circulatory system Blood supply of the body. Cardiac output Heart rate Vascular resistance Blood vessels Cardiology - Pulmonary circulation Oxygenation of the blood. < ...

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Heart - Structure

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