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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