Amphibians have closed circulatory system Closed
Any external force applied on the system. Type of force ? ; from collision with another system, from a gravity field, gravity force. Depending on the system, from other field forces like electromagnetic force.
Closed System
Brown bear have a close circulation system
closed system
closed system
Closed System
closed.
closed system
The light bulb is a closed system: no mass transfer.
closed curves.
A closed system is one where there is no mass entering or leaving the system.