The two upper chambers of the heart that receive blood from the veins are called ___________.

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Multiple Choice

The two upper chambers of the heart that receive blood from the veins are called ___________.

Explanation:
The main idea is identifying the receiving, upper chambers of the heart. These chambers are the atria. Blood returning from the body via veins enters the right atrium, while blood coming from the lungs via the pulmonary veins enters the left atrium. The atria are thinner-walled and designed to receive blood and pass it to the ventricles below, where it’s pumped onward. The term auricle refers to the small ear-like extensions on the atria, not the chambers themselves. The ventricles are the lower chambers that actually pump blood out to the lungs and the rest of the body. The standard plural for these chambers is atria, not atriums.

The main idea is identifying the receiving, upper chambers of the heart. These chambers are the atria. Blood returning from the body via veins enters the right atrium, while blood coming from the lungs via the pulmonary veins enters the left atrium. The atria are thinner-walled and designed to receive blood and pass it to the ventricles below, where it’s pumped onward. The term auricle refers to the small ear-like extensions on the atria, not the chambers themselves. The ventricles are the lower chambers that actually pump blood out to the lungs and the rest of the body. The standard plural for these chambers is atria, not atriums.

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