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The respiratory system contains which of the following structures and organs? a. blood, blood vessels, heart b. tonsils, thymus, spleen, red bone marrow c. lymph nodes, lymph vessels d. lungs, respiratory
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The respiratory system contains which of the following structures and organs?

a. blood, blood vessels, heart
b. tonsils, thymus, spleen, red bone marrow
c. lymph nodes, lymph vessels
d. lungs, respiratory passages, diaphragm

User GodSaveTheDucks
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The answer for that question is a
User Aga
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