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  2. Heart - Wikipedia

    en.wikipedia.org/wiki/Heart

    The heart is a muscular organ found in humans and other 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]

  3. 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 ...

  4. Electrocardiography - Wikipedia

    en.wikipedia.org/wiki/Electrocardiography

    A heart rate below normal is called "bradycardia" (<60 in adults) and above normal is called "tachycardia" (>100 in adults). A complication of this is when the atria and ventricles are not in synchrony and the "heart rate" must be specified as atrial or ventricular (e.g., the ventricular rate in ventricular fibrillation is 300–600 bpm ...

  5. Heat is lost from the body in proportion to the amount of exposed skin. [287] [288] The head accounts for around 7–9% of the body's surface, and studies have shown that having one's head submerged in cold water only causes a person to lose 10% more heat overall. [289] [medical citation needed]

  6. Cardiovascular disease - Wikipedia

    en.wikipedia.org/wiki/Cardiovascular_disease

    Cardiovascular disease (CVD) is any disease involving the heart or blood vessels. [3] CVDs constitute a class of diseases that includes: coronary artery diseases (e.g. angina, heart attack), heart failure, hypertensive heart disease, rheumatic heart disease, cardiomyopathy, arrhythmia, congenital heart disease, valvular heart disease, carditis, aortic aneurysms, peripheral artery disease ...

  7. Can standing too much be harmful to heart health? - AOL

    www.aol.com/standing-too-much-harmful-heart...

    Standing more does not improve heart health compared with sitting and may increase a person's risk for circulatory issues such as deep vein thrombosis and varicose veins, a new study finds.

  8. Myasthenia gravis is one of the rarest and most concerning ...

    www.aol.com/myasthenia-gravis-one-rarest-most...

    It's called myasthenia gravis and affects only about 37 out of every 100,000 people in ... It occurs "when a person’s immune system is essentially attacking their own body," adds Sara ...

  9. Situs inversus - Wikipedia

    en.wikipedia.org/wiki/Situs_inversus

    The heart is located on the right side of the thorax, the stomach and spleen on the right side of the abdomen and the liver and gall bladder on the left side. The heart's normal right atrium occurs on the left, and the left atrium is on the right. The lung anatomy is reversed and the left lung has three lobes while the right lung has two lobes.

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