Ok
Closed. It also has a water-vascular system. :)
Brown bear have a close circulation system
it is close so then the blood can float in it nice and easy
"Show" is open, "and" is closed. O- is open, -pen is closed. "Closed" is closed.
In an open container because the warm air can melt the ice faster.
a construction site?
Its sort of a cross between the two, but is mostly closed. This due to the different stages of evolution etc. Not so. Fish have a closed circulatory system, Arteries carry blood from the heart and veins return the blood to the heart.
The opposite of the adjective closed is open. The opposite of the verb closed is opened.
Both open syllables.
Clams have an open circulatory system. Their blood is pumped by a heart into large sinuses through which it bathes the organs directly before being returned to the heart.
One open, one closed
Both closed syllables.