New York State Emergency Medical Technician (EMT) Practice Exam

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Where does deoxygenated blood return from the body?

Right atrium
Right ventricle
Left atrium
Left ventricle

The correct answer is: Right atrium

Deoxygenated blood returns from the body to the right atrium of the heart. This process is facilitated through the superior and inferior vena cavae, which are large veins that carry blood from the upper and lower parts of the body, respectively. Once the deoxygenated blood enters the right atrium, it is then channeled into the right ventricle, where it is pumped into the pulmonary circulation for oxygenation. This sequence is crucial for maintaining the circulation of blood through both the systemic and pulmonary circuits, ensuring that oxygen-depleted blood returns to the heart for replenishment before being sent to the lungs.