When elephants are swimming, what protects the blood vessels around their lungs from water pressure damage?
A) They swim only in shallow water.
B) Their lungs are attached to the chest cavity with dense connective tissue.
C) They hold their breath.
D) They have thick-walled blood vessels near their lungs.
E) Their ribs, which surround all their blood vessels, provide protection and support.
Correct Answer:
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