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  2. Heart - Wikipedia

    en.wikipedia.org/wiki/Heart

    Heart being dissected showing right and left ventricles, from above. The heart has four chambers, two upper atria, the receiving chambers, and two lower ventricles, the discharging chambers. The atria open into the ventricles via the atrioventricular valves, present in the atrioventricular septum.

  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. Systole - Wikipedia

    en.wikipedia.org/wiki/Systole

    Systole (/ ˈ s ɪ s t əl i / SIST-ə-lee) is the part of the cardiac cycle during which some chambers of the heart contract after refilling with blood. [1] Its contrasting phase is diastole , the relaxed phase of the cardiac cycle when the chambers of the heart are refilling with blood.

  5. These Are the 2 Biggest Signs of Heart Valve Damage ... - AOL

    www.aol.com/2-biggest-signs-heart-valve...

    “There are four chambers of the heart too. The two at the top are the left atrium and right atrium and the bottom chambers are the left ventricle and right ventricle. In between the [top ...

  6. Cardiac cycle - Wikipedia

    en.wikipedia.org/wiki/Cardiac_cycle

    The heart is a four-chambered organ consisting of right and left halves, called the right heart and the left heart. The upper two chambers, the left and right atria, are entry points into the heart for blood-flow returning from the circulatory system, while the two lower chambers, the left and right ventricles, perform the contractions that ...

  7. Atrium (heart) - Wikipedia

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

    Humans have a four-chambered heart consisting of the right and left atrium, and the right and left ventricle. The atria are the two upper chambers which pump blood to the two lower ventricles. The right atrium and ventricle are often referred to together as the right heart, and the left atrium and ventricle as the left heart.

  8. Jim Harbaugh heart condition: Why Chargers coach left game ...

    www.aol.com/jim-harbaugh-heart-condition-why...

    Jim Harbaugh said he has atrial flutter, a type of arrhythmia that causes the upper chambers of the heart to beat 250 to 350 times per minute. A flare up today is what caused him to leave the game.

  9. Ventricle (heart) - Wikipedia

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

    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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