Sylvia700
Answered

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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

Sagot :

The answer is D. Respiratory system = breathing system. Keep that in mind.
Its D. You Require All That To Breathe
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