A closed system does not require contact and interaction with the environment in order to survive, this could also be considered a characteristic. A closed system could also be referred to as an isolated system in thermodynamics.
open: matter and energy can pass freely in and out closed: only energy can pass freely isolated: nothing can pass freely
Amphibians have closed circulatory system Closed
Brown bear have a close circulation system
Closed System
A closed system of stratification is one in which your social status is decided by birth right as apposed to personal accomplisments. In this type of system, it does not matter how much wealth or knowledge you attain, but who your decendants are.
The light bulb is a closed system: no mass transfer.
The closed system prevented the flys in.
Yes it has a closed circulatory system
closed circulatory system
closed circulatory system (double circulatory system)
closed
Platypuses have a closed circulatory system.