J.R. S. answered 02/11/21
Ph.D. University Professor with 10+ years Tutoring Experience
The circulatory is a closed system. The others are open systems.
Tiff W.
asked 02/11/21Question 4 options:
circulatory system, which contains the blood vessels
respiratory system, which we use to breathe with
digestive system, which use to absorb nutrients from the food we eat
J.R. S. answered 02/11/21
Ph.D. University Professor with 10+ years Tutoring Experience
The circulatory is a closed system. The others are open systems.
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