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In a Vertebrate with a Four-Chambered Heart, the Structure or Region

Question 107

Multiple Choice

In a vertebrate with a four-chambered heart, the structure or region containing blood with the lowest O₂ concentration is the

A) pulmonary vein.
B) pulmonary artery.
C) left atrium.
D) aorta.
E) arteriole end of a capillary.

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