Blood in the pulmonary vein is oxygen rich, while in all of the other veins, it is oxygen poor.
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A healthy person who exercise's regularly
The answer should be B.
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Answer:
B Heart and lungs
Explanation:
The thoracic cavity is another term for the chest cavity. It is enclosed by the ribs, spine, and breast bone, and is separated from the abdomen by the diaphragm.
It contains the heart, lungs, and the esophagus, and the blood vessels that supply them.
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