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Dr. Schweitzer found structures identical to modern red blood cells and blood vessels inside the bone. Which organ system do blood cells and blood vessels belong to? A. circulat…

Dr. Schweitzer found structures identical to modern red blood cells and blood vessels inside the bone. Which organ system do blood cells and blood vessels belong to? A. circulat…
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Dr. Schweitzer found structures identical to modern red blood cells and blood vessels inside the bone. Which organ system do blood cells and blood vessels belong to? A. circulatory system B. nervous system C. respiratory system D. skeletal system ​

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User Bellu
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1 Answer

5 votes

Answer:

A. Circulatory system

Step-by-step explanation:

Circulatory system consist of heart,blood cells&blood vessels

answered
User Pawel Szulc
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