i now its the heart valve . . . . . . .
Heart
heart
i`ve onl know that the eye is the part of it that can be replaced by surgery thats i`ve know
The heart, individual heart valves, and blood vessels can be replaced by surgery.
I really only know 2 parts that can be replaced and those are a pump in your heart and a valve.
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closed circulatory system (double circulatory system)
They're both the circulatory system.
Amphibians have closed circulatory system Closed
The circulatory system
open circulatory systemclosed circulatory system.