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  2. Tracheid - Wikipedia

    en.wikipedia.org/wiki/Tracheid

    In radial section, two tracheids of a coniferous wood species are shown. A series of bordered pits are also appearing in each tracheid. A tracheid of oak shows pits along the walls. It has no perforation plates. Angiosperms have both tracheids and vessel elements. [1] A tracheid is a long and tapered lignified cell in the xylem of vascular ...

  3. Chordae tendineae - Wikipedia

    en.wikipedia.org/wiki/Chordae_tendineae

    The chordae tendineae (sg.: chorda tendinea) or tendinous cords, colloquially known as the heart strings, are inelastic cords of fibrous connective tissue that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart.

  4. 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 ...

  5. Cardiac physiology - Wikipedia

    en.wikipedia.org/wiki/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. Anatomy of the human heart - Wikipedia

    en.wikipedia.org/wiki/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 venae cavae and pumps blood to the lungs through the pulmonary artery, and the left ...

  7. Health in Vietnam - Wikipedia

    en.wikipedia.org/wiki/Health_in_Vietnam

    Thirty percent of heart disease deaths are caused by smoking cigarettes. [22] Lung cancer is the third leading cause of death in Vietnam and tobacco risk factors that cause death and disability. [23] Vietnam has reduced the supply of tobacco products through the ratification of the World Health Organization Framework Convention on Tobacco Control.

  8. Rheumatic fever - Wikipedia

    en.wikipedia.org/wiki/Rheumatic_fever

    Heart complications may be long-term and severe, particularly if valves are involved. In countries in Southeast-Asia, sub-Saharan Africa, and Oceania, the percentage of people with rheumatic heart disease detected by listening to the heart was 2.9 per 1000 children and by echocardiography it was 12.9 per 1000 children.

  9. Coronary ischemia - Wikipedia

    en.wikipedia.org/wiki/Coronary_ischemia

    Heart disease in women goes undetected prior to a major cardiac event in up to 60% of cases. [19] Among women who experience a heart attack, many do not have any prior chest pain. [ 19 ] Due to alterations in sensory pathways, diabetic and elderly individuals also may present without any chest pain and may have atypical symptoms similar to ...