heart - ορισμός. Τι είναι το heart
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Τι (ποιος) είναι heart - ορισμός

ORGAN FOUND INSIDE MOST ANIMALS
Cardiac; Human heart; Atria of the heart; Heart chamber; Heart in literature; Heart Symbolism and Metaphor; Heart (Symbolism and Metaphor); Apex of the heart; Cardiac chambers; Heart (anatomy); Right heart; Left heart; Four chambered heart; Heart (biology); The human heart; Sternocostal surface of heart; Anterior wall of heart; Diaphragmatic surface of heart; Apex cordis; Base of the heart; Apex of heart; Basis cordis; Base of heart; Heart (organ); Heart chambers; Cardiogenic; Sternocostal surface; Chambers of the heart; Dorsal tube; Right side of the heart; Left side of the heart; Cardiac chamber; Systemic heart; The heart; Facies diaphragmatica cordis; Anterior surface of the heart; Facies sternocostalis cordis; Facies anterior cordis; Heart (metaphor); Heart (symbolism); Atlas of Human Cardiac Anatomy; User:CFCF/draft/Heart; Heart (food); Facies cordis; Sternocostal surface of the heart; User:Tom (LT)/sandbox/Heart diseases; Insect heart; User:LT910001/sandbox/Heart diseases; Embryonic development of the human heart; 🫀; Human Heart
  • Layers of the heart wall, including visceral and parietal pericardium
  • The swirling pattern of myocardium helps the heart pump effectively
  • Frontal section showing [[papillary muscle]]s attached to the [[tricuspid valve]] on the right and to the [[mitral valve]] on the left via [[chordae tendineae]].<ref name="CNX2014"/>
  • The prepotential is due to a slow influx of sodium ions until the threshold is reached followed by a rapid depolarization and repolarization. The prepotential accounts for the membrane reaching threshold and initiates the spontaneous depolarization and contraction of the cell; there is no resting potential.<ref name="CNX2014"/>
  • The cardiac cycle as correlated to the ECG
  • Cardiac cycle shown against ECG
  • The x-axis reflects time with a recording of the heart sounds. The y-axis represents pressure.<ref name="CNX2014"/>
  • Autonomic innervation of the heart
  • Development of the human heart during the first eight weeks (top) and the formation of the heart chambers (bottom). In this figure, the blue and red colors represent blood inflow and outflow (not venous and arterial blood). Initially, all venous blood flows from the tail/atria to the ventricles/head, a very different pattern from that of an adult.<ref name="CNX2014"/>
  • [[Elize Ryd]] making a heart sign at a concert in 2018
  • Animated heart
  • 3D echocardiogram]] showing the mitral valve (right), tricuspid and mitral valves (top left) and aortic valve (top right).<br /> The closure of the heart valves causes the [[heart sounds]].
  • Basic [[arthropod]] body structure – heart shown in red
  • Computer-generated animation of a beating human heart
  • Schematic of [[cephalopod]] heart
  • Sinus venosus}}
  • Arterial supply to the heart (red), with other areas labelled (blue).
  • Transmission of a [[cardiac action potential]] through the heart's conduction system
  • Blood flow through the heart
  • Heart being dissected showing right and left ventricles, from above
  • archive-date=20 November 2010}}</ref>
  • Human heart during an [[autopsy]]
  • Blood flow through the valves
  • Heart and its blood vessels, by [[Leonardo da Vinci]], 15th century
  • Cardiology video
  • [[Real-time MRI]] of the human heart
  • Video explanation of blood flow through the heart
  • pericardial cells]] (red). Blue depicts [[cell nuclei]].
  • Blood flow through the fish heart: sinus venosus, atrium, ventricle, and outflow tract}}

Human error assessment and reduction technique         
TECHNIQUE IN HUMAN RELIABILITY ASSESSMENT AND ERROR IDENTIFICATION
HEART; Human Error Assessment and Reduction Technique
Human error assessment and reduction technique (HEART) is a technique used in the field of human reliability assessment (HRA), for the purposes of evaluating the probability of a human error occurring throughout the completion of a specific task. From such analyses measures can then be taken to reduce the likelihood of errors occurring within a system and therefore lead to an improvement in the overall levels of safety.
heart         
n.
organ that circulates the blood
1) to transplant a heart
2) a healthy, strong; weak heart
3) an artificial heart
4) a heart beats; fails, stops; palpitates, throbs; pumps blood
the heart as the center of emotions
5) to gladden; harden smb.'s heart
6) to break; steal, win smb.'s heart
7) my heart aches, bleeds (for her)
8) from the heart (to speak from the heart)
9) in one's heart (in my heart I know that she is right)
disposition
10) a cold, cruel, hard; good, kind, soft, tender, warm; stout heart (she has a kind heart); a heart of gold
liking
11) to have a heart for (she has no heart for this type of work)
12) after one's own heart (he's a man after my own heart)
sympathy
13) to have a heart (have a heart and lend me some money)
essence
14) to get to the heart of smt.
15) at heart (he's not bad at heart)
feeling
16) a heavy; light heart
17) with a (heavy) heart
courage
18) to take heart from (he took heart from her example)
19) to lose heart
20) a brave; faint heart
21) the heart to + inf. (I didn't have the heart to tell her)
memory
22) by heart (to know a poem by heart)
resolve
23) to set one's heart (on doing smt.)
24) a change of heart
misc.
25) a bleeding heart ('one who always supports the underdog'); to eat one's heart out ('to brood'); to lose one's heart to ('to fall in love with'); from the bottom of one's heart ('sincerely'); to have one's heart in the right place ('to have good intentions'); to do smb.'s heart good ('to make one happy'); with all one's heart ('wholeheartedly'); to take smt. to heart ('to take smt. seriously'); the way to smb.'s heart
heart         
n.
1.
Seat of life, centre of circulation, organ of circulation.
2.
Centre, interior, core, kernel, essence, inner part, vital part.
3.
Disposition, mind, will, inclination, purpose, intent, affection, passion.
4.
Courage, spirit, firmness, fortitude, resolution.
5.
Love, affections, feeling, emotion, seat of affection or love, seat of feeling or passion.
6.
Conscience, moral nature, sense of good and ill, moral feeling, seat of character, character, seat of moral life.

Βικιπαίδεια

Heart

The heart is a muscular organ in most animals. This organ pumps blood through the blood vessels of the circulatory system. The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to the lungs. In humans, the heart is approximately the size of a closed fist and is located between the lungs, in the middle compartment of the chest, called the mediastinum.

In humans, other mammals, and birds, the heart is divided into four chambers: upper left and right atria and lower left and right ventricles. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. Fish, in contrast, have two chambers, an atrium and a ventricle, while most reptiles have three chambers. In a healthy heart blood flows one way through the heart due to heart valves, which prevent backflow. The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid. The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium.

The heart pumps blood with a rhythm determined by a group of pacemaker cells in the sinoatrial node. These generate a current that causes the heart to contract, traveling through the atrioventricular node and along the conduction system of the heart. In humans, deoxygenated blood enters the heart through the right atrium from the superior and inferior venae cavae and passes it to the right ventricle. From here it is pumped into pulmonary circulation to the lungs, where it receives oxygen and gives off carbon dioxide. Oxygenated blood then returns to the left atrium, passes through the left ventricle and is pumped out through the aorta into systemic circulation, traveling through arteries, arterioles, and capillaries—where nutrients and other substances are exchanged between blood vessels and cells, losing oxygen and gaining carbon dioxide—before being returned to the heart through venules and veins. The heart beats at a resting rate close to 72 beats per minute. Exercise temporarily increases the rate, but lowers it in the long term, and is good for heart health.

Cardiovascular diseases are the most common cause of death globally as of 2008, accounting for 30% of deaths. Of these more than three-quarters are a result of coronary artery disease and stroke. Risk factors include: smoking, being overweight, little exercise, high cholesterol, high blood pressure, and poorly controlled diabetes, among others. Cardiovascular diseases do not frequently have symptoms but may cause chest pain or shortness of breath. Diagnosis of heart disease is often done by the taking of a medical history, listening to the heart-sounds with a stethoscope, as well as with ECG, echocardiogram, and ultrasound. Specialists who focus on diseases of the heart are called cardiologists, although many specialties of medicine may be involved in treatment.

Παραδείγματα από το σώμα κειμένου για heart
1. England‘s heart linked to England‘s heart of darkness.
2. Not just anybody." Story continues below HEART–TO–HEART: Dr.
3. The cause of two deaths was heart–related: one had a heart attack, the other an enlarged heart.
4. Researchers at the University of Minnesota were able to create a beating heart using the outer structure of one heart and injecting heart cells from another rat.
5. In Britain, medical experts say hypertensive heart disease is the most common cause of heart failure after coronary heart disease due to smoking, alcohol and obesity.