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  2. Anatomy of the human heart - Wikipedia

    en.wikipedia.org/wiki/Anatomy_of_the_human_heart

    Anatomy of the human heart. The heart is a muscular organ situated in the mediastinum. It consists of four chambers, four valves, two main arteries (the coronary arteries), and the conduction system. The left and right sides of the heart have different functions: the right side receives de-oxygenated blood through the superior and inferior ...

  3. Heart - Wikipedia

    en.wikipedia.org/wiki/Heart

    The heart is a muscular organ found in most animals. This organ pumps blood through the blood vessels. [ 1 ] Heart and blood vessels together make the circulatory system. [ 2 ] The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs. [ 3 ]

  4. Circulatory system - Wikipedia

    en.wikipedia.org/wiki/Circulatory_system

    Capillaries join the arteries and veins. The circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate. [1][2] It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia ...

  5. Cardiac physiology - Wikipedia

    en.wikipedia.org/wiki/Cardiac_physiology

    Cardiac physiology. Cardiac physiology or heart function is the study of healthy, unimpaired function of the heart: involving blood flow; myocardium structure; the electrical conduction system of the heart; the cardiac cycle and cardiac output and how these interact and depend on one another.

  6. Cardiac cycle - Wikipedia

    en.wikipedia.org/wiki/Cardiac_cycle

    See media help. The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the beginning of the next. [1] It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, following a period of robust contraction and pumping of blood, called systole. [1]

  7. Atrium (heart) - Wikipedia

    en.wikipedia.org/wiki/Atrium_(heart)

    The atrium (Latin: ātrium, lit. 'entry hall'; pl.: atria) is one of the two upper chambers in the heart that receives blood from the circulatory system. The blood in the atria is pumped into the heart ventricles through the atrioventricular mitral and tricuspid heart valves. There are two atria in the human heart – the left atrium receives ...

  8. Sinoatrial node - Wikipedia

    en.wikipedia.org/wiki/Sinoatrial_node

    9477. Anatomical terminology. [edit on Wikidata] The sinoatrial node (also known as the sinuatrial node, SA node or sinus node) is an oval shaped region of special cardiac muscle in the upper back wall of the right atrium made up of cells known as pacemaker cells. The sinus node is approximately 15 mm long, 3 mm wide, and 1 mm thick, located ...

  9. Ventricle (heart) - Wikipedia

    en.wikipedia.org/wiki/Ventricle_(heart)

    7100. Anatomical terminology. [edit on Wikidata] A ventricle is one of two large chambers located toward the bottom of the heart that collect and expel blood towards the peripheral beds within the body and lungs. The blood pumped by a ventricle is supplied by an atrium, an adjacent chamber in the upper heart that is smaller than a ventricle.

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