Question

In a closed circulatory system blood is completely enclosed within

Answer 1

iN A closed circulatory system blood is completely enclosed in arteries

Answer 2

Vertebrates, and a few invertebrates, have a closed circulatory system. Closed circulatory systems have theblood closed at all times within vessels of different size and wall thickness. In this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities.