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Sylvia700
Sylvia700 Sylvia700
  • 07-06-2015
  • Biology
Answered

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

Verified Answer :

ohona ohona
  • 07-06-2015

The answer is D. Respiratory system = breathing system. Keep that in mind.

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Taee19 Taee19
  • 07-06-2015

Its D. You Require All That To Breathe

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