The Circulatory system is composed of 1.______,2._____ and 3.______. The 4._____ is the liquid part that is constantly flowing throughout the body. The heart is known as the 5._____ organ of the body. The 6.______ are the vast networks of small tubes that carry blood throughout the body.
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Answer:
1.Heart
2.Vessels
3.Arteries
4.veins
5.Key
6.Capilaries
Explanation:
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