Which chamber is the first to receive blood returning from the body via the vena cavae?

Prepare for the NLN PAX Science Exam with flashcards and multiple choice questions. Each question includes hints and detailed explanations to boost your confidence and exam readiness.

Multiple Choice

Which chamber is the first to receive blood returning from the body via the vena cavae?

Explanation:
Blood that returns from the body via the vena cavae enters the heart at the right atrium, which is the chamber that collects systemic venous blood. From there, the blood moves to the right ventricle, then to the lungs for oxygenation, and finally returns to the left side of the heart. So, the first chamber to receive that blood is the right atrium. The other chambers receive blood later in the circulation sequence, not directly from the vena cavae.

Blood that returns from the body via the vena cavae enters the heart at the right atrium, which is the chamber that collects systemic venous blood. From there, the blood moves to the right ventricle, then to the lungs for oxygenation, and finally returns to the left side of the heart. So, the first chamber to receive that blood is the right atrium. The other chambers receive blood later in the circulation sequence, not directly from the vena cavae.

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