Heart

cardiachuman heartapex of the heartleft heartright heartheart chamberapexchambersCardiac carecardiogenic
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system.wikipedia
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Organ (anatomy)

organorgansviscera
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system.
The main tissue is that which is unique for the specific organ, such as the myocardium, the main tissue of the heart, while sporadic tissues include the nerves, blood vessels, and connective tissues.

Muscle

musclesmuscularmusculature
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system.
They are primarily responsible for maintaining and changing posture, locomotion, as well as movement of internal organs, such as the contraction of the heart and the movement of food through the digestive system via peristalsis.

Ventricle (heart)

ventricleleft ventricleright ventricle
In humans, other mammals, and birds, the heart is divided into four chambers: upper left and right atria; and lower left and right ventricles.
A ventricle is one of two large chambers toward the bottom of the heart that collect and expel blood received from an atrium towards the peripheral beds within the body and lungs.

Heart valve

heart valvesvalvesatrioventricular valves
In a healthy heart blood flows one way through the heart due to heart valves, which prevent backflow.
A heart valve normally allows blood to flow in only one direction through the heart.

Mediastinum

mediastinalposterior mediastinumanterior mediastinum
In humans, the heart is located between the lungs, in the middle compartment of the chest.
The mediastinum contains the heart and its vessels, the esophagus, trachea, phrenic and cardiac nerves, the thoracic duct, thymus and lymph nodes of the central chest.

Pericardium

epicardiumpericardialpericardial cavity
The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid.
The pericardium is a double-walled sac containing the heart and the roots of the great vessels.

Blood vessel

vascularblood vesselsintravascular
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system.
There are three major types of blood vessels: the arteries, which carry the blood away from the heart; the capillaries, which enable the actual exchange of water and chemicals between the blood and the tissues; and the veins, which carry blood from the capillaries back toward the heart.

Sinoatrial node

sinus nodesinoatrialsinoatrial (SA) node
The heart pumps blood with a rhythm determined by a group of pacemaking cells in the sinoatrial node.
The sinoatrial node (SA node), also known as sinus node, is a group of cells located in the wall of the right atrium of the heart.

Cardiovascular disease

heart diseasecardiac diseaseheart condition
Cardiovascular diseases (CVD) are the most common cause of death globally as of 2008, accounting for 30% of deaths.
Cardiovascular disease (CVD) is a class of diseases that involve the heart or blood vessels.

Blood

human bloodhematologicalblood-forming
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system.
Blood is circulated around the body through blood vessels by the pumping action of the heart.

Heart rate

heartbeatresting heart ratemaximum heart rate
The heart beats at a resting rate close to 72 beats per minute.
Heart rate is the speed of the heartbeat measured by the number of contractions (beats) of the heart per minute (bpm).

Aorta

aorticaortic archaortic root
Oxygenated blood then returns to the left atrium, passes through the left ventricle and is pumped out through the aorta to the systemic circulation−where the oxygen is used and metabolized to carbon dioxide. The semilunar aortic valve is at the base of the aorta and also is not attached to papillary muscles. The upper part of the heart is the attachment point for several large blood vessels—the venae cavae, aorta and pulmonary trunk.
The aorta is the main artery in the human body, originating from the left ventricle of the heart and extending down to the abdomen, where it splits into two smaller arteries (the common iliac arteries).

Inferior vena cava

inferiorIVCposterior vena cava
The heart receives blood low in oxygen from the systemic circulation, which enters the right atrium from the superior and inferior venae cavae and passes to the right ventricle.
The inferior vena cava (or IVC) is a large vein that carries deoxygenated blood from the lower and middle body into the right atrium of the heart.

Pulmonary circulation

pulmonary vesselspulmonary circuitalveolar capillaries
From here it is pumped into the pulmonary circulation, through the lungs where it receives oxygen and gives off carbon dioxide.
The pulmonary circulation is the portion of the circulatory system which carries deoxygenated blood away from the right ventricle of the heart, to the lungs, and returns oxygenated blood to the left atrium and ventricle of the heart.

Atrioventricular node

atrioventricularAV nodeAV
These generate a current that causes contraction of the heart, traveling through the atrioventricular node and along the conduction system of the heart.
The atrioventricular node, or AV node is a part of the electrical conduction system of the heart that coordinates the top of the heart.

Electrocardiography

electrocardiogramECGelectrocardiograph
Diagnosis of heart disease is often done by the taking of a medical history, listening to the heart-sounds with a stethoscope, ECG, and ultrasound.
Electrocardiography (ECG or EKG) is the process of recording the electrical activity of the heart over a period of time using electrodes placed over the skin.

Chest pain

chestchest painschest tightness
Cardiovascular diseases frequently do not have symptoms or may cause chest pain or shortness of breath.
Even though chest pain may not be related to a heart problem, noncardiac chest pain can still be due to significant disease.

Cardiac skeleton

annulusaortic annulusfibrous ring
The cardiac skeleton is made of dense connective tissue and this gives structure to the heart.
The cardiac skeleton, also known as the fibrous skeleton of the heart, is a high density single structure of connective tissue that forms and anchors the valves and influences the forces exerted through them.

Sternum

manubriumsternalbreastbone
The back surface of the heart lies near the vertebral column, and the front surface sits behind the sternum and rib cartilages.
It connects to the ribs via cartilage and forms the front of the rib cage, thus helping to protect the heart, lungs, and major blood vessels from injury.

Mitral valve

mitralbicuspid valvemitral annulus
The mitral valve lies between the left atrium and left ventricle.
The mitral valve, also known as the bicuspid valve or left atrioventricular valve, is a valve with two flaps in the heart, that lies between the left atrium and the left ventricle.

Superior vena cava

superioranterior vena cavaSVC
The heart receives blood low in oxygen from the systemic circulation, which enters the right atrium from the superior and inferior venae cavae and passes to the right ventricle.
The superior vena cava (SVC) is the superior of the two venae cavae, the great venous trunks that return deoxygenated blood from the systemic circulation to the right atrium of the heart.

Stroke

strokesischemic strokecerebrovascular accident
Of these more than three quarters are a result of coronary artery disease and stroke.
The TOAST (Trial of Org 10172 in Acute Stroke Treatment) classification is based on clinical symptoms as well as results of further investigations; on this basis, a stroke is classified as being due to (1) thrombosis or embolism due to atherosclerosis of a large artery, (2) an embolism originating in the heart, (3) complete blockage of a small blood vessel, (4) other determined cause, (5) undetermined cause (two possible causes, no cause identified, or incomplete investigation).

Aortic valve

aorticaortic valvesaortic semilunar valve
The semilunar aortic valve is at the base of the aorta and also is not attached to papillary muscles.
The aortic valve is a valve in the human heart between the left ventricle and the aorta.

Foramen ovale (heart)

foramen ovaleatrial septalforamen ovale in a fetus's heart
In the wall of the right atrium is an oval-shaped depression known as the fossa ovalis, which is a remnant of an opening in the fetal heart known as the foramen ovale.
In the fetal heart, the foramen ovale, also foramen Botalli, ostium secundum of Born or falx septi, allows blood to enter the left atrium from the right atrium.

Pulmonary artery

pulmonary arteriespulmonary trunkpulmonary
The upper part of the heart is the attachment point for several large blood vessels—the venae cavae, aorta and pulmonary trunk.
A pulmonary artery is an artery in the pulmonary circulation that carries deoxygenated blood from the right side of the heart to the lungs.