When the blood flow pumped by the heart is confined in the vessels( veins,arteries, capillaries.)
Amphibians have closed circulatory system Closed
closed circulatory system (double circulatory system)
Yes it has a closed circulatory system
closed circulatory system
Sea otters have a closed circulatory system.
Platypuses have a closed circulatory system.
closed circulatory system.
Brown bear have a close circulation system
closed circulatory system
Worms have a closed circulatory system because they inherited it from their ancestors.
A double closed circulatory system.
Humans have a closed circulatory system. This is because all of the blood is kept within veins, arteries and capillaries. The circulatory system helps us transport oxygen to cells.