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The heart cavity is divided down the middle into a right and a left heart, which in turn are subdivided into two chambers. The upper chamber is called an atrium (or auricle), and the lower chamber is called a ventricle. The two atria act as receiving chambers for blood entering the heart; the more muscular...

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7y ago
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12y ago

1.Atrium's

2.Ventricles

3.Arteries

4.Veins

5.Capillaries

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12y ago

the atria

(which is Latin for entrance)

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10y ago

Left Atrium and right atrium
atria

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13y ago

Right and Left Atrium

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13y ago

right and left atrium

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13y ago

Left atria and right atria

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13y ago

The left and right atrium.

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Q: What are the upper chambers of the heart called?
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