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  2. Atrioventricular node - Wikipedia

    en.wikipedia.org/wiki/Atrioventricular_node

    The blood supply of the AV node is from the atrioventricular nodal branch. The origin of this artery is most commonly (80–90% of hearts) a branch of the right coronary artery, with the remainder originating from the left circumflex artery. [4] [5] [6] This is associated with the dominance of the coronary artery circulation.

  3. Tricuspid valve - Wikipedia

    en.wikipedia.org/wiki/Tricuspid_valve

    The tricuspid valve, or right atrioventricular valve, is on the right dorsal side of the mammalian heart, at the superior portion of the right ventricle.The function of the valve is to allow blood to flow from the right atrium to the right ventricle during diastole, and to close to prevent backflow (regurgitation) from the right ventricle into the right atrium during right ventricular ...

  4. Surface-supplied diving skills - Wikipedia

    en.wikipedia.org/wiki/Surface-supplied_diving_skills

    Before a dive the equipment must be thoroughly checked that it is suitable for the dive and in good working order, particularly those components which are part of the life-support system – the breathing apparatus, which includes: [2]: 171–2 Non-return valve test (safety critical). Main air supply. Bailout check. Comms check.

  5. Heart valve - Wikipedia

    en.wikipedia.org/wiki/Heart_valve

    A heart valve is a biological one-way valve that allows blood to flow in one direction through the chambers of the heart. A mammalian heart usually has four valves. Together, the valves determine the direction of blood flow through the heart.

  6. Cardiac cycle - Wikipedia

    en.wikipedia.org/wiki/Cardiac_cycle

    The section shows: 1) the opened ventricles contracting once per heartbeat—that is, once per each cardiac cycle; 2) the (partly obscured) mitral valve of the left heart; 3) the tricuspid and pulmonary valves of the right heart—note these paired valves open and close oppositely. + (The aortic valve of the left heart is located below the ...

  7. Outline of cardiology - Wikipedia

    en.wikipedia.org/wiki/Outline_of_cardiology

    Tricuspid stenosis – Narrowing of the tricuspid valve opening that reduces blood flow through the valve. Ebstein's anomaly – A congenital heart defect that results in the tricuspid valve leaflets being deeper in the heart (toward the apex) than normal. The annulus of the valve is in the correct position, however, and the portion of the ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Circulatory system - Wikipedia

    en.wikipedia.org/wiki/Circulatory_system

    In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. [1] [2] It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia meaning heart, and Latin vascula meaning vessels).