i`ve onl know that the eye is the part of it that can be replaced by surgery thats i`ve know
Heart
heart
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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drow the three major parst of circulatory system
... The major organs of the circulatory system are the heart, blood, and blood vessels.
Grasshoppers have an open circulatory system, and worms have a closed circulatory system. There you go. :)
Not clear on which 3 classes are the "major ones", but Polyplacophorans, Gastropods, and Bivalves have an open circulatory system while Cephalopods have a closed circulatory system.
The heart and circulatory system.
Heart
veins..