Pulmonary and systemic circulation
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The heart and the blood vessels.
Pulmonary circuit and the systemic circuit.
drow the three major parst of circulatory system
... The major organs of the circulatory system are the heart, blood, and blood vessels.
Refer to the exhibit. Which two routes are level 1 ultimate routes? (Choose two.) ~ 192.168.1.0 192.168.2.0
Grasshoppers have an open circulatory system, and worms have a closed circulatory system. There you go. :)
The major organ of the circulatory system is the heart. The three parts that are involved with the circulatory system are the blood, the heart, and the vessels.
Heart
veins..
Artery.
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.