Atrium

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The atrium is the upper region of the [[Heart|heart]] consisting of two chambers in humans.  
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The atrium is the upper region of the [[Heart|heart]] consisting of two chambers in [[Humans|humans]].  
  
It connects the blood vessels (which pump blood into the heart) and the [[Ventricles|ventricles]]. The right atrium receives blood from the rest of the body (systemic circulation) via the superior vena cava and the inferior vena cava (venous circulation). Blood in the right atrium is always deoxygenated. The left atrium receives blood from the [[Lungs|lungs]] via the [[Pulmonary_vein|pulmonary veins]]. Blood in the left atrium is always oxygenated. Both atria are connected to ventricles via [[Atrioventricular valves|atrioventricular valves]]; the ones connecting the right atrium to the right ventricle are tricuspid and the ones connecting the left atrium to the left ventricles are mitral.
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It connects the [[blood vessels|blood vessels]] (which pump blood into the heart) and the [[Ventricles|ventricles]]. The right atrium receives [[blood|blood]] from the rest of the body (systemic circulation) via the [[superior vena cava|superior vena cava]] and the [[inferior vena cava|inferior vena cava]] (venous circulation). Blood in the right atrium is always deoxygenated. The left atrium receives blood from the [[Lungs|lungs]] via the [[Pulmonary vein|pulmonary veins]]. Blood in the left atrium is always oxygenated. Both atria are connected to ventricles via [[Atrioventricular valves|atrioventricular valves]]; the ones connecting the right atrium to the right ventricle are tricuspid and the ones connecting the left atrium to the left ventricles are mitral.

Latest revision as of 10:13, 16 November 2018

The atrium is the upper region of the heart consisting of two chambers in humans.

It connects the blood vessels (which pump blood into the heart) and the ventricles. The right atrium receives blood from the rest of the body (systemic circulation) via the superior vena cava and the inferior vena cava (venous circulation). Blood in the right atrium is always deoxygenated. The left atrium receives blood from the lungs via the pulmonary veins. Blood in the left atrium is always oxygenated. Both atria are connected to ventricles via atrioventricular valves; the ones connecting the right atrium to the right ventricle are tricuspid and the ones connecting the left atrium to the left ventricles are mitral.

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